Rechner

Kraftstoffkosten-Rechner

Estimate the gas cost of any trip from distance, fuel economy, and the price per gallon.

Benzin-Rechner

Figure out what it costs to top off your tank from its current level.

MPG-Rechner

Compute real miles per gallon from your odometer and gallons pumped.

Geschwindigkeitsrechner

Calculate average speed from distance and time — supports hours and minutes.

Fahrzeit-Rechner

Estimate driving time including planned rest stops.

Pendelweg-Rechner

Add up gas, insurance, and parking for the full year of commuting.

Roadtrip-Kosten-Rechner

Total a road trip budget: gas, hotels, and food, in one shot.

E-Auto-Ladekosten-Rechner

See what charging your electric vehicle actually costs per month at home rates.

Tesla-Ladekosten-Rechner

Estimate weekly and yearly home charging cost for your Tesla model.

Auto-Wertverlust-Rechner

Estimate your car's current value after years and mileage.

Fahrgemeinschaft-Rechner

See how much carpooling cuts your annual commute cost.

BH-Größenrechner

Calculate your bra size from band and bust measurements.

Gewichtsdecken-Rechner

Find your ideal weighted blanket weight using the 10% rule.

Tischdeckengröße-Rechner

Find the right tablecloth size for any table and desired drop length.

Tellerrock-Rechner

Compute fabric size and waist radius for a full circle skirt.

Stromkosten-Rechner

Compute the monthly cost of running any appliance from wattage and use.

Farbverbrauch-Rechner

Estimate how many gallons of paint your room needs.

Bodenbelag-Rechner

Compute square footage and material needed including waste factor.

Fliesen-Rechner

Count tiles needed for any room with waste built in.

Hypothekenrechner

Estimate monthly payments including principal, interest, taxes, and insurance.

Solar Panel Savings Calculator

Estimate annual savings and payback period for a residential solar install.

Klimaanlagen-BTU-Rechner

Find the BTU rating you need to properly cool a room.

Trinkgeld-Rechner

Compute the tip and per-person split for any bill.

Rabatt-Rechner

Find the sale price and savings for any percent off.

Gehalt in Stundenlohn

Convert an annual salary into an hourly rate.

Stundenlohn in Gehalt

Convert an hourly wage to monthly and annual income.

ROI-Rechner

Compute return on investment and annualized return.

Gewinnmarge-Rechner

Compute gross profit and margin from revenue and cost.

Freelancer-Tarif-Rechner

Work out the hourly rate you need to charge to hit your income goal.

Pomodoro-Rechner

Plan focus blocks and breaks using the 25/5 pomodoro technique.

Überstunden-Rechner

Compute weekly pay with overtime at 1.5x past 40 hours.

Meeting-Kosten-Rechner

Calculate what a meeting truly costs in payroll dollars.

Altersrechner

Calculate exact age in years, months, and days from any date of birth.

Tage bis Weihnachten

How many days, hours, and minutes are left until Christmas Day?

Schlafzyklus-Rechner

Find optimal wake-up or bedtime based on 90-minute sleep cycles.

Geburtstermin-Rechner

Estimate your due date and current pregnancy week from your last period.

Werktage-Rechner

Count working days (Mon–Fri) between any two dates.

Münzwurf

Flip a virtual coin — heads or tails, fair random.

Würfel-Roller

Roll any combination of D4, D6, D8, D10, D12, D20, or D100.

Zufallszahlengenerator

Generate random numbers in any range, with or without duplicates.

Ja-oder-Nein-Generator

Let randomness decide. A fair coin flip with words.

Sternzeichen-Rechner

Look up your Western astrological sign from your date of birth.

Liebeskompatibilität-Rechner

Just-for-fun compatibility score from two names.

Duschkosten-Rechner

Compute the yearly cost of your showers in water and energy.

Sonnencreme-Rechner

How much sunscreen you actually need per day at the beach.

Lesezeit-Rechner

Estimate how long a book or article will take to read.

Hörbuch-Geschwindigkeit-Rechner

See how much time you save listening at higher playback speeds.

BMI-Rechner

Body Mass Index from height and weight, with the standard category breakdown.

Kalorien-Rechner

Estimate daily calorie needs via Mifflin-St Jeor BMR and activity multiplier.

Wasserbedarf-Rechner

Estimate your daily water target adjusted for activity and climate.

Schritte in Meilen

Convert step counts to miles using your stride length or height estimate.

Prozentrechner

Solve any percentage question: X% of Y, X is what % of Y, percent change.

Quadratfuß-Rechner

Compute area for rectangles, circles, and triangles in square feet.

Römische-Zahl-Konverter

Convert any number 1–3999 to a Roman numeral and back.

Binär in Dezimal

Convert between binary and decimal in either direction.

Bruchrechner

Add, subtract, multiply, or divide two fractions with auto-simplification.

Currency Converter

Quick approximate currency conversion using static reference rates.

Pig-Latin-Übersetzer

Translate any text into Pig Latin instantly.

Umgedrehter Text

Flip your text upside down with Unicode tricks.

Wortzähler

Count words, characters, and reading time for any text.

Horsepower Calculator

Compute horsepower from engine torque and RPM using the standard SAE formula.

Tire Size Calculator

Decode a tire size into overall diameter, sidewall height, and circumference.

Compression Ratio Calculator

Engine static compression ratio from bore, stroke, deck, gasket, and chamber volumes.

Rpm Calculator

Compute engine RPM at a given speed from tire size, gear, and final drive.

0 60 Calculator

Estimate 0-60 mph time from horsepower, weight, and drivetrain.

Wheel Horsepower Calculator

Estimate WHP at the wheels after drivetrain losses.

Turbo Size Calculator

Estimate compressor airflow target for a turbo build.

Boost Horsepower Calculator

Estimate boosted HP from a naturally-aspirated baseline and boost pressure.

Bsfc Calculator

Compute brake-specific fuel consumption from fuel flow and brake horsepower.

Wheel Offset Calculator

Compute wheel offset in mm from width and backspacing.

Speedometer Gear Calculator

Estimate the right driven-gear tooth count for accurate speedometer reading.

Boat Speed Calculator

Estimate top boat speed from HP and weight using Crouch's planing formula.

Nautical Mile Calculator

Convert between nautical miles, statute miles, and kilometers.

Crosswind Calculator

Resolve runway wind into headwind and crosswind components.

Flight Radiation Calculator

Estimate cosmic-ray radiation dose for a flight.

Gvwr Calculator

Total your truck's loaded weight and see which GVWR class it falls into.

Fuel Pump Calculator

Estimate fuel flow demand and per-injector load for a given HP target.

Traffic Density Calculator

Compute traffic density (vehicles per mile) from flow rate and speed.

Winch Size Calculator

Find the minimum winch capacity for your vehicle and terrain.

Parkkosten-Rechner

Compare pay-as-you-go parking against a monthly pass.

Ölwechsel-Kosten-Rechner

Compare DIY vs shop oil changes over a year of driving.

Car Insurance Estimator

Rough estimate of annual auto insurance premiums by age, vehicle, and coverage.

Fahrradgeschwindigkeit-Rechner

Compute road-bike speed from cadence, gearing, and wheel size.

Train Vs Drive Calculator

Compare driving cost against a train ticket, including the value of your time.

CO2-Fußabdruck der Reise

Estimate CO₂ emissions for any trip by mode and distance.

Uber Vs Car Calculator

Compare monthly rideshare spend against the full cost of car ownership.

Miles To Dollars Calculator

Estimate the cash value of your airline miles by program and redemption.

Meilen-pro-Jahr-Rechner

Total annual driving miles from commuting, leisure, and road trips.

Engine Hours To Miles

Convert engine hours (on a marine or industrial engine) to equivalent automotive miles.

Entfernungsrechner

Solve any of distance, speed, or time given the other two.

Toll Cost Calculator

Add up weekly, monthly, and annual toll spend — and the E-ZPass discount.

Flugzeit-Rechner

Estimate flight time from distance, cruise speed, and layover length.

Ticket Optimizer

Should you buy event tickets now or wait? A simple heuristic by time-to-event and category.

Schuhgrößen-Umrechnung

Convert between US Men, US Women, UK, EU, and CM shoe sizes.

Ringgrößen-Umrechner

Convert between US, UK, EU, and inner diameter / circumference ring sizes.

Kleidergröße-Rechner

Find your US, UK, and EU dress size from bust, waist, and hip measurements.

Jeansgröße-Rechner

Get your W × L jeans size from waist and inseam measurements.

Hutgröße-Rechner

Find your hat size in numeric, fitted, and S/M/L formats from head circumference.

Gürtelgröße-Rechner

Find the belt size to order from your pants waist or measured waist.

Jackengröße-Rechner

Find your jacket size and length from chest, height, and weight.

Handschuhgröße-Rechner

Find your glove size from hand circumference at the knuckles.

Sockengröße-Rechner

Convert shoe size to sock size (S/M/L/XL).

T-Shirt-Größe-Rechner

Get your t-shirt size from chest and waist measurements.

Hosengröße-Rechner

Get your W × L pants size and a hip-to-waist ratio flag.

Kleidergrößen-Umrechner

Convert women's top sizes across US, UK, EU, AU, IT, FR, and JP.

US-zu-UK-Schuhgröße

Convert US shoe sizes to UK in either men's or women's sizing.

UK-zu-US-Schuhgröße

Convert UK shoe sizes to US in either men's or women's sizing.

Herren- zu Damen-Schuhgröße

Convert between men's and women's US shoe sizes (1.5-size offset).

Kinderschuhgröße-Rechner

Convert measured foot length to US toddler/youth shoe size.

Garn-Rechner

How many skeins you need for a project, with a 10% safety buffer.

Stricknadelgröße-Umrechner

Convert knitting needle sizes between US, metric (mm), and old UK numbering.

Quilt-Einfassung-Rechner

Compute strips and yardage for quilt binding.

Halbquadrat-Dreieck-Rechner

Cut size and square count for half-square triangles.

Vorhangbahnen-Rechner

Compute panel width and required fabric for window curtains.

Gummibandlänge-Rechner

Find elastic length for waistbands, cuffs, and necklines.

Nähgarn-Rechner

Estimate thread consumed by a seam from length and stitch type.

Schnürsenkellänge-Rechner

Find the right shoelace length for your shoe and lacing style.

Verlorene-Socken-Rechner

Estimate how many socks you've lost to the laundry over the years.

Bikini-Rechner

Get top and bottom bikini sizes from bra size and hip measurement.

Tapeten-Rechner

Calculate rolls of wallpaper needed for a room, with waste and pattern repeat.

Mietleistbarkeit-Rechner

Check if your target rent fits the 30% rule and standard DTI limits.

Hausrenovierung-Kosten

Get a price range for kitchen, bath, basement, and other renovations.

Umzugskosten-Rechner

Estimate the cost of a local, long-distance, or interstate move.

Rasengröße-Rechner

Compute lawn area in square feet and acres, plus seed and mowing estimates.

Zaunkosten-Rechner

Estimate fence cost by perimeter, material, height, and gate count.

Storage Unit Size

Pick the right storage unit size for your home and items.

Weihnachtsbaumgröße

Find the right tree height and width for your room.

Kerzenbrenndauer

Estimate how many hours a candle will burn from size, wick count, and wax type.

Dämmung R-Wert

Find recommended R-value and additional insulation needed by climate zone.

Dumpster Size Calculator

Find the right roll-off dumpster size for your project.

Internet Speed Cost

See $-per-Mbps and whether your plan suits your usage.

Water Bill Calculator

Estimate monthly water usage and cost from household activity.

GPA-Rechner

Calculate your weighted GPA across up to 6 courses, with letter grades and credit hours.

Notenrechner

Compute your weighted course grade across up to 5 assignments.

Testergebnis-Rechner

Compute percentage and letter grade from correct answers.

Arbeitsstunden-Rechner

Daily, weekly, and monthly hours from start time, end time, and breaks.

Rechnungs-Rechner

Subtotal, discount, tax, and total for up to 5 line items.

Break-Even-Rechner

Units and revenue needed to cover fixed and variable costs.

Zeichenzähler

Characters, words, Twitter remaining, and SMS segments for any text.

Passwortstärke-Prüfer

Score a password's strength locally based on length, variety, and patterns.

Schriftgröße-Konverter

Convert between px, pt, em, rem, vw, and percent at a chosen base.

Sat Score Calculator

Approximate scaled SAT scores from raw section scores.

Zahlen in Wörter

Spell out any number up to a trillion in English.

Text-Umkehr-Generator

Reverse a string character-by-character or word order.

Nato Phonetic Alphabet

Spell any word using the NATO phonetic alphabet.

Lernzeit-Rechner

Plan study hours per subject given an exam date and difficulty.

Zeitzonen-Konverter

Convert a time between major world time zones.

Renteneintritts-Rechner

Find your retirement date and time remaining based on age and country.

Tage bis zum Geburtstag

Count down to your next birthday from today's date.

Arbeitstage-Rechner

Count working days between two dates, excluding US federal holidays.

Schlafenszeit-Rechner

Find the best bedtimes to wake refreshed at a target time.

Aufwachzeit-Rechner

Find the best wake times after a chosen bedtime.

Countdown-Timer

Count down the days, hours, and minutes to any future date.

Wie-lange-her-Rechner

Count years, months, days, weeks, and hours since a past date.

Koreanisches-Alter-Rechner

Convert international age to traditional Korean age.

Mondphasen-Rechner

Find the moon phase, illumination, and next full moon for any date.

Palindrome Date Finder

Find all palindrome dates in a given year.

Schaltjahr-Rechner

Check whether a year is a leap year, plus the next and last leap year.

Zeitdauer-Rechner

Difference between two times in hours, minutes, and seconds.

Zeit in Dezimal

Convert HH:MM to a decimal hour value and back.

Hörbuch-Rechner

Plan your audiobook reading pace and yearly book goals.

TV-Serien-Dauer

Total runtime of a series across seasons, episodes, and lengths.

Binge-Watching-Rechner

Find your binge finish date based on daily watch time.

Hängematten-Rechner

Hang point height, tree spacing, and strap length for a comfy hammock.

Heliumballons-Rechner

How many balloons does it take to lift a given weight?

Zeltgröße-Rechner

Find the right tent capacity for your campers, gear, and style.

Numerologie-Rechner

Compute Life Path and Name numbers from your DOB and full name.

Glückszahlen-Generator

Generate lottery-style numbers seeded by your name and today's date.

Minecraft-Tage-Rechner

Convert between real minutes and Minecraft in-game days.

Robux in USD

Convert Robux to dollars (and back) at both direct buy and DevEx rates.

Poker-Odds-Rechner

Rough heads-up and multi-way win probability by hole-card category.

Schach-Rating-Rechner

Compute your new Elo after a single game vs an opponent.

Protein-Rechner

Daily protein target by body weight, activity level, and goal.

Makro-Rechner

Daily calories, protein, fat, and carb targets from your body and goal.

Körperfett-Rechner

Estimate body fat percentage with the US Navy method.

Idealgewicht-Rechner

Compare your weight to Devine, Robinson, Miller, Hamwi, and healthy-BMI ranges.

Lauftempo-Rechner

Find pace, time, or distance from any two of the three.

Verbrannte Kalorien

Calories burned for any activity using MET values.

Diaper Calculator

Estimate diapers needed and cost by baby's age and brand.

Cost Of Having Baby

Total estimated cost of delivery plus the first five years.

Expiration Date Calculator

Estimate expected expiration date by item type.

Battery Charge Time

Estimate hours to charge a battery from current to target level.

Linear Inches Calculator

Total linear inches and airline carry-on / checked classification.

Headphone Power

How much amp power your headphones need to hit a target SPL.

Well Volume Calculator

Compute gallons of water in a well from diameter and depth.

Garbage Bag Size

Find the right gallon-rated bag size for your trash can.

Picture Frame Calculator

Compute mat, frame, and overall sizes for any artwork.

Kubikfuß-Rechner

Compute volume in cubic feet, yards, meters, and liters.

Hex in Dezimal

Convert between hexadecimal and decimal, with binary preview.

Wissenschaftlicher Rechner

Evaluate math expressions with sin/cos/tan, log, sqrt, pi, e, and more.

Note in GPA

Convert a letter grade or percentage into GPA points.

Lese-Herausforderung-Rechner

Track progress on a yearly reading goal and project your finish date.

Wie Lange ein Buch Zu Lesen

Estimate hours to read a book at your pace.

Seiten pro Stunde

Measure your actual reading speed in pages per hour and words per minute.

Buch-Wortzahl

Typical word counts and page estimates by genre.

Goodreads-Ziel-Rechner

Are you on pace for your Goodreads reading challenge?

Kindle-Seitenzahl

Convert KOLL Kindle pages to print pages and words.

Bad-vs-Dusche-Rechner

Find out whether baths or showers are cheaper for you over a year.

Haarwachstum-Rechner

Months to grow your hair to a target length.

Beauty-Produkte-Rechner

Annual cost of your beauty routine.

Zahnpasta-Rechner

Tubes per year and annual toothpaste cost.

Händewaschen-Zeit

WHO-recommended hand-washing time and song references.

Hautpflege-Kosten-Rechner

Roll up the per-day and per-year cost of your skincare routine.

Parfüm-Haltbarkeit

How many weeks a perfume bottle will last at your usage.

Haarfärbe-Kosten

Annual hair color cost by method and frequency.

Make-up-Kosten-Rechner

Annual cost of your makeup kit.

Seifenverbrauch-Rechner

How long a bar of soap lasts and the monthly cost.

Masken-Rechner

Masks needed per month and annual cost by type.

Wie Reich Bin Ich

Where your income ranks against US (and rough global) distributions.

Net Worth Calculator

Compute net worth from assets minus liabilities; compare to age peers.

IQ-Wert-Rechner

Rough IQ estimate from a raw test score — strictly informal.

Fantasy-Football-Rechner

Score a player line in standard, PPR, or half-PPR scoring.

Auswirkung des Social-Media-Verbots

Estimate reach and revenue lost if your account is banned.

Alternativen zur TikTok-Zeit

What you could do instead of scrolling TikTok for X minutes a day.

Alternativen zur Social-Media-Zeit

Yearly hours sunk into social media — and what they could become.

Pixels To Inches

Convert between pixels and physical inches at any PPI.

Pounds And Ounces

Combine pounds and ounces into total weight in oz, grams, kg, and decimal lbs.

Feet And Inches Calculator

Convert, add, or subtract feet-and-inches values.

Height In Inches

Convert feet+inches height to inches, cm, and meters with a percentile note.

Acreage Calculator

Compute area in acres from any shape's dimensions.

Land Area Calculator

Land area in acres, hectares, bigha, katha, gaj, cent, and marla.

Lot Size To Acres

Convert lot size in square feet (or L×W) to acres and other units.

Lot Size To Sq Feet

Convert acres or other area units to square feet and find the side of a square lot.

Scale Calculator

Solve scaled, real, or ratio given the other two.

Download Time Calculator

How long a file will take to download at a given connection speed.

Torque To Hp

Compute horsepower from torque and RPM (or torque from HP and RPM).

Watts To Amps

Compute amperage from wattage at a chosen voltage.

Amps To Watts

Compute wattage from amperage at a chosen voltage.

Kwh To Kw

Convert between energy (kWh) and average power (kW) over a time period.

Dbm To Watts

Logarithmic conversion between dBm and watts.

Rms To Watts

Compute RMS and peak power from RMS voltage and impedance.

Joules To Volts

Convert energy and charge (or capacitance) into voltage.

Barometric Pressure

Pressure converted across all weather units with a forecast hint.

Ppm Calculator

Parts-per-million across PPM, PPB, ppt, percent, and mg/L.

Hardness Conversion

Convert between Rockwell C, Rockwell B, Brinell, Vickers, and Shore D.

Verhältnis-Rechner

Simplify, scale, percentage-ize, or split a ratio.

Imperial To Metric

One-stop imperial→metric conversion across length, weight, volume, temperature, speed.

Metric To Imperial

Convert metric to imperial across length, weight, volume, temperature, and speed.

Dimensional Analysis

Educational unit-conversion chain across length, weight, volume, speed, temperature.

ACT-Punktzahl-Rechner

Convert ACT raw section scores to scaled 1–36 scores and a composite.

College-GPA-Rechner

Compute term and cumulative GPA on the 4.0 scale.

Endnoten-Rechner

Find the score you need on the final exam to reach your target grade.

Notenkurve-Rechner

Apply square-root, flat-point, or scale-to-100 curves to a test score.

Abschlussjahr-Rechner

Find your high-school and college graduation years.

GWA-Rechner

Compute General Weighted Average on the Philippine 1.0–5.0 scale.

Highschool-GPA-Rechner

Weighted and unweighted GPA with honors/AP/IB course bonuses.

IELTS-Punktzahl-Rechner

Convert IELTS raw scores to band scores and an overall band.

Impact-Faktor-Rechner

Compute a journal's impact factor from citations and article count.

PTE-Punktzahl-Rechner

Weighted overall PTE Academic score with CEFR equivalent.

Semesternoten-Rechner

Weighted course grade across all assignments.

Testnoten-Rechner

Percentage and letter grade from correct answers, with optional penalties.

GPA-Rechner Pakistan

CGPA on the Pakistani HEC 4.0 scale from marks and credit hours.

Klassenraum-Abstand-Rechner

Maximum desks in a room given social-distancing spacing.

Seitenverhältnis-Rechner

Find an aspect ratio from dimensions, or solve a missing dimension.

Bilddateigröße-Rechner

Estimate image file size by dimensions, bit depth, and format.

PPI-Rechner

Pixels per inch from screen resolution and diagonal size.

Bildschirmgröße-Rechner

Width, height, and area from a diagonal and aspect ratio.

TV-Größe-Rechner

Recommended TV diagonal for your seating distance.

TV-Montagehöhe-Rechner

Ideal wall height to mount a TV for eye-level viewing.

Videodateigröße-Rechner

Estimate video file size from duration, resolution, and codec.

Belichtungs-Rechner

Compute exposure value from aperture, shutter speed, and ISO.

Schärfentiefe-Rechner

Near, far, and total depth of field for any lens setup.

Brennweiten-Rechner

Focal length from sensor size and field of view, plus 35mm equivalent.

Crop-Faktor-Rechner

Crop factor and 35mm-equivalent focal lengths from sensor dimensions.

Auflösungsskala-Rechner

Scale a resolution by a factor and see the pixel-count change.

Zeitraffer-Rechner

Photos, video length, and storage for a time-lapse shoot.

Verschlusszeit-Rechner

Recommended shutter speed for handheld, motion, or astro shots.

Sichtfeld-Rechner

Horizontal, vertical, and diagonal angle of view for a lens.

Hyperfokale-Distanz-Rechner

The focus distance that maximizes depth of field.

Pixel-zu-Druckgröße-Rechner

Maximum print size for an image at a chosen DPI.

Beamer-Rechner

Throw distance or screen size from a projector's throw ratio.

Bildverhältnis-Rechner

Resize an image keeping its aspect ratio.

Kontrastverhältnis-Rechner

Display contrast ratio from white and black luminance.

Linsenvergrößerung-Rechner

Magnification and reproduction ratio for a lens at a subject distance.

Blinzelfreies-Foto-Rechner

How many shots you need for a blink-free group photo.

Frames-zu-Timecode-Rechner

Convert a frame number to HH:MM:SS:FF timecode.

Timecode-zu-Frames-Rechner

Convert HH:MM:SS:FF timecode to a total frame count.

Film-Rechner

Rolls, frames, and cost for an analog film shoot.

Vertikale-Überhöhung-Rechner

Vertical exaggeration factor for profiles and cross-sections.

3D-Rendering-Rechner

Total render time and completion date for a 3D project.

Streaming-Bitrate-Rechner

Recommended streaming bitrate and required upload speed.

BPM-Rechner

Calculate tempo (BPM) from a beat count and duration.

Notenfrequenz-Rechner

Frequency of any musical note in equal temperament.

Musik-Intervall-Rechner

Name the interval between two notes and its frequency ratio.

Tonleiter-Rechner

Generate the notes of any scale from a root note.

Akkord-Rechner

Notes and intervals for any chord from a root note.

Akkord-Finder

Identify a chord from a set of notes.

Akkordumkehrung-Rechner

Reorder a chord's notes into root, 1st, 2nd, or 3rd inversion.

Akkordfolge-Generator

Build a chord progression in any key.

Akkord-Transponierer

Transpose a chord progression to a new key.

Musik-Transposition-Rechner

Transpose a note up or down by a number of semitones.

Halbton-Rechner

Count the semitones between two notes.

Tonart-Rechner

Sharps, flats, and relatives for any major or minor key.

Musikdauer-Rechner

Total playing time from BPM, time signature, and bar count.

Delay-und-Reverb-Rechner

Note-synced delay times in milliseconds for a given tempo.

Bund-Rechner

Distance of each fret from the nut for a given scale length.

Gitarrensaiten-Spannung-Rechner

Approximate string tension from gauge, scale length, and pitch.

Obertonreihen-Rechner

First 16 harmonics of a fundamental frequency.

Stimmumfang-Rechner

Classify a voice type from the lowest and highest comfortable notes.

Lautsprechergehäuse-Rechner

Recommended enclosure volume for a driver.

Bassreflex-Rohrlänge-Rechner

Port length for a vented speaker enclosure.

Audiodateigröße-Rechner

Estimate audio file size by sample rate, bit depth, and channels.

Akkulaufzeit-Rechner

Estimate device runtime from battery capacity and consumption.

Akkukapazität-Rechner

Convert between Ah, Wh, and joules for a battery.

Akkugröße-Rechner

Minimum battery capacity for a target runtime.

Drohnen-Flugzeit-Rechner

Estimate drone flight time from battery and motor draw.

Drohnen-Motor-Rechner

Thrust per motor and thrust-to-weight ratio for a multirotor.

Tastverhältnis-Rechner

Duty cycle, frequency, and average voltage of a PWM signal.

eDPI-Rechner

Effective DPI for FPS mouse sensitivity comparison.

Passwort-Entropie-Rechner

Estimate password strength in bits of entropy and crack time.

RAID-Rechner

Usable storage and fault tolerance for a RAID array.

chmod-Rechner

Convert Unix file permissions to octal and symbolic notation.

IP-Subnetz-Rechner

Network, broadcast, host range, and host count for an IPv4 subnet.

CIDR-Rechner

Parse CIDR notation into network, range, and host count.

Bandbreite-Rechner

Required bandwidth to transfer a file in a target time.

Upload-Zeit-Rechner

How long a file takes to upload at a given speed.

Verfügbarkeits-Rechner

Allowed downtime for a given uptime percentage.

Datenübertragungs-Rechner

Transfer time across USB, Ethernet, Wi-Fi, 5G, and fiber.

Baudrate-Rechner

Effective data throughput of a serial connection.

IP-Adressen-Umrechner

Convert an IPv4 address between dotted-decimal, integer, and hex.

Base64-Encoder

Encode text to Base64 or decode Base64 back to text.

ASCII-Umrechner

Convert text to ASCII codes and back.

Hamming-Code-Rechner

Add Hamming parity bits to a binary data word.

Hamming-Distanz-Rechner

Count differing bits between two binary strings.

Paritätsbit-Rechner

Compute the parity bit for a binary data word.

Logikgatter-Rechner

Evaluate any 2-input logic gate and show its truth table.

OpAmp-Verstärkung-Rechner

Voltage gain of inverting and non-inverting op-amp circuits.

PCB-Leiterbahnbreite-Rechner

Minimum trace width for a current using the IPC-2221 standard.

PCB-Leiterbahn-Widerstand-Rechner

Resistance and voltage drop of a PCB copper trace.

PCB-Leiterbahn-Strom-Rechner

Maximum current a PCB trace can carry (IPC-2221).

PCB-Impedanz-Rechner

Characteristic impedance of a microstrip PCB trace.

Kabel-Impedanz-Rechner

Characteristic impedance of a coaxial cable.

Ausbreitungsverzögerung-Rechner

Signal travel delay through a trace or cable.

LM317-Rechner

Resistor value for a target LM317 regulator output voltage.

RAM-Latenz-Rechner

True memory latency in nanoseconds from CL and frequency.

Impedanzanpassung-Rechner

L-network component values to match two impedances.

Klirrfaktor-Rechner

THD from a fundamental and its harmonic amplitudes.

HF-Einheiten-Umrechner

Convert RF power between dBm, watts, and dBW.

Vigenère-Chiffre-Rechner

Encrypt or decrypt text with the Vigenère cipher.

Hex-zu-Text-Umrechner

Decode a hexadecimal string into readable text.

Gleitkomma-Rechner

Show the IEEE 754 single-precision representation of a number.

GSD-Rechner

GSD for aerial/drone mapping from sensor, lens, and altitude.

Bandbreite-Verzögerung-Produkt-Rechner

Data in flight on a network path — the ideal TCP window size.

KD-Rechner

Compute your kill/death ratio and KDA from kills, deaths, and assists.

Minecraft-Kreis-Generator

Generate the block count and shape data for a Minecraft circle of any diameter.

Minecraft-Stapel-Rechner

Work out full stacks, leftovers, and chest space for any pile of Minecraft items.

Nether-Portal-Rechner

Convert Overworld coordinates to the Nether and back at Minecraft's 1:8 ratio.

End-Portal-Finder

Estimate how far a Minecraft stronghold sits from the world origin by its ring.

Pokémon-GO-Bonbon-Rechner

Find how much candy you need to evolve a Pokémon and how far you must walk for it.

Pyramidenblock-Rechner

Count the blocks needed to build a solid, hollow, or stepped pyramid.

Rust-Verfall-Rechner

Estimate how much health a Rust structure loses to decay while you are offline.

Impostor-Wahrscheinlichkeit-Rechner

Work out your chance of being the impostor in a social-deduction party game.

CBM-Rechner

Calculate cubic metres (CBM) of a shipment from carton dimensions and quantity.

Volumengewicht-Rechner

Find the billable weight of a parcel by comparing actual weight to dimensional weight.

DPMO-Rechner

Calculate Defects Per Million Opportunities and the matching Six Sigma level.

Frachtklasse-Rechner

Determine NMFC freight class from a shipment's weight and dimensions by density.

Paletten-Rechner

Work out how many boxes fit on a pallet, with layers and total stack weight.

Nachbestellpunkt-Rechner

Calculate the inventory reorder point from demand, lead time, and safety stock.

Taktzeit-Rechner

Calculate takt time — the production pace needed to meet customer demand.

Container-Beladung-Rechner

Estimate how many shipping containers a cargo load needs by volume and weight.

Weihnachts-Countdown

See exactly how many days, weeks, and shopping days are left until Christmas.

Oster-Rechner

Find the date of Easter Sunday for any year using the Gregorian algorithm.

Schneemann-Rechner

Size the three balls of a snowman and estimate how much snow you need.

Vampir-Apokalypse-Rechner

Model how fast vampires could convert the human population through exponential growth.

Zombie-Invasion-Rechner

Estimate how fast a zombie outbreak spreads using a simplified infection model.

Süßes-oder-Saures-Rechner

Estimate the candy haul and walking distance from a night of trick-or-treating.

Weiße-Weihnachten-Rechner

See the historical probability of snow on the ground on Christmas Day by city.

Maya-Kalender-Umrechner

Convert any Gregorian date to the Maya Long Count, Tzolkin, and Haab calendars.

Neujahrsvorsätze-Rechner

Plan a resolution: see days left in the year and total hours you can commit.

Windchill-Rechner

Calculate the NWS wind chill temperature and frostbite risk from temp and wind speed.

Niederschlags-Rechner

Calculate the volume of water collected from rainfall over a given area.

Regen-zu-Schnee-Rechner

Convert rainfall to expected snowfall using temperature-based snow ratios.

Sonnenbad-Rechner

Estimate safe sun exposure time from skin type, UV index, and sunscreen SPF.

Erdbeben-Rechner

Calculate the energy released by an earthquake and its intensity at a distance.

Antipoden-Rechner

Find the exact point on the opposite side of the Earth from any coordinates.

Azimut-Rechner

Calculate the compass bearing (azimuth) from one coordinate to another.

Breitengrad-Längengrad-Distanz-Rechner

Calculate the great-circle distance between two coordinates with the Haversine formula.

Engagement-Rate-Rechner

Calculate social media engagement rate from followers, likes, comments, and shares.

Sauerstoffflaschen-Dauer-Rechner

Estimate how long a medical oxygen cylinder lasts at a given flow rate.

Diamantgewicht-Rechner

Estimate the carat weight of a diamond from its shape and millimetre measurements.

Gender-Pay-Gap-Rechner

Calculate the pay gap between two salaries as a percentage and dollar difference.

PERT-Rechner

Calculate a PERT three-point estimate with standard deviation and variance.

NaNoWriMo-Rechner

Track your novel-writing pace and find the daily word count needed to hit your goal.

Salzteig-Rechner

Scale a salt dough recipe up or down for any number of batches.

Pizza-Trinkgeld-Rechner

Split a pizza order with tip across friends and see the per-person cost.

Matched-Betting-Rechner

Calculate the lay stake, liability, and locked-in profit for a matched bet.

Wochentag-Rechner

Find the day of the week for any date, plus day number and week of the year.

Rekrutierungsdauer-Rechner

Estimate total time-to-hire by adding up each stage of your recruitment process.

Aquarium-Rechner

Calculate aquarium volume, full weight, and fish capacity from tank dimensions.

Aquariumglas-Dicke-Rechner

Estimate the minimum glass thickness needed for an aquarium of a given size.

Sandkasten-Rechner

Calculate how much sand a sandbox needs and the number of bags to buy.

Cäsar-Chiffre-Verschiebung

Encrypt or decrypt text with a Caesar cipher and see all 25 brute-force shifts.

USA-Flaggen-Rechner

Calculate every dimension of a US flag from its hoist height per Executive Order 10834.

TP-Rechner 5e

Calculate a D&D 5e character's hit points by class, level, and Constitution modifier.

Begegnungs-Rechner 5e

Rate a D&D 5e combat encounter as easy, medium, hard, or deadly by XP thresholds.

Punktekauf-Rechner 5e

Track the 27-point budget for D&D 5e ability scores and see the modifiers.

Poker-EV-Rechner

Calculate the expected value of a poker call from pot size, bet, and your equity.

Kleinbuchstaben in Großbuchstaben

Convert any lowercase text to UPPERCASE instantly in your browser.

Großschreibung-Umrechner

Capitalize the first letter of every word, including short words and articles.

Satzschreibung-Umrechner

Capitalize the first letter of each sentence and lowercase the rest.

Kapitälchen-Generator

Convert text to ꜱᴍᴀʟʟ ᴄᴀᴘs using Unicode small-capital letters.

Kleintext-Generator

Convert text to ˢᵐᵃˡˡ superscript-style letters for bios and captions.

Durchgestrichener-Text-Generator

Add a Unicode strikethrough line through any text you can copy anywhere.

Tiefgestellt-Generator

Convert numbers and letters to Unicode subscript characters.

Hochgestellt-Generator

Convert numbers and letters to Unicode superscript characters.

Gothische-Schrift-Generator

Convert text to 𝔤𝔬𝔱𝔥𝔦𝔠 Fraktur letters you can copy and paste.

Spiegeltext-Generator

Reverse text and create a mirrored backwards version you can copy.

Zahlen-zu-Buchstaben-Umrechner

Decode a number sequence into letters using A=1, B=2 … Z=26.

Buchstaben-zu-Zahlen-Umrechner

Encode letters into numbers using A=1, B=2 … Z=26.

Hash-Identifizierer

Identify a hash type from its length and character set — MD5, SHA, bcrypt and more.

16:9-Seitenverhältnis-Rechner

Calculate the 16:9 height for any width — the standard widescreen video ratio.

16:10-Seitenverhältnis-Rechner

Calculate the 16:10 height for any width — common on laptop and monitor screens.

4:3-Seitenverhältnis-Rechner

Calculate the 4:3 height for any width — the classic fullscreen TV ratio.

CSS-Seitenverhältnis-Rechner

Generate the CSS aspect-ratio property and padding-top percentage for any ratio.

Pixel-Seitenverhältnis-Rechner

Calculate the pixel aspect ratio (PAR) from display and pixel dimensions.

Hochformat-Seitenverhältnis-Rechner

Calculate portrait-orientation heights at common ratios like 2:3, 3:4, and 9:16.

Bildschirmverhältnis-Rechner

Find the simplified aspect ratio of any screen from its width and height.

Tage bis zum Herbst

Count down the days until the first day of autumn (September 22).

Tage bis Valentinstag

Count down the days remaining until Valentine's Day on February 14.

Neujahrs-Countdown

Count down the days, hours, and minutes until New Year's Day.

Karat-Gewicht-Rechner

Convert gemstone weight in grams to carats and points.

Diamant-Karat-Rechner

Convert diamond weight to carats and estimate carat weight from a round diamond's diameter.

mm-zu-Karat-Umrechnung

Estimate a gemstone's carat weight from its millimetre diameter by shape.

In Welcher Klasse War Ich

Find which US school grade you were in during any given year.