43 unit converters that get the numbers right.
Length, weight, temperature, volume, engineering units, data and numbers. No signup, no paywalls.
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Everyday Units 15 converters
- Area ConverterSquare feet, square meters, acres, hectares
- Cooking Temperature ConverterOven °F, °C and gas marks
- Feet and Inches CalculatorAdd and subtract feet, inches and fractions
- Fuel Efficiency ConverterMPG, L/100km and km/L
- Length ConverterMeters, feet, inches, miles and more
- Pace ConverterRunning pace and race finish times
- Paper Size CalculatorA-series, Letter, Legal and Tabloid sizes
- Speed Convertermph, km/h, knots, m/s and Mach
- Temperature ConverterCelsius, Fahrenheit, Kelvin and more
- Time Unit ConverterSeconds to years and everything between
- Typing Speed ConverterWPM, characters and keystrokes per minute
- Unit Converter200+ units across 11 categories
- Volume ConverterLiters, gallons, cups, ounces and more
- Weight ConverterKilograms, pounds, ounces, stones and more
- Weight on Other Planets CalculatorYour weight on the Moon, Mars and more
Science & Engineering 21 converters
- Acceleration Converterm/s², ft/s², g and gal
- Angle ConverterDegrees, radians, gradians and more
- Battery Capacity ConvertermAh, Ah and watt-hours, plus run time
- Density Converterkg/m³, g/cm³, lb/ft³ and more
- Electric Charge ConverterCoulombs, mAh, Ah and faradays
- Energy ConverterJoules, calories, BTU, kWh and eV
- Flow Rate ConverterGPM, liters per minute, CFM and more
- Force ConverterNewtons, pound-force, kgf and dynes
- Frequency ConverterHertz, kHz, MHz, GHz and RPM
- Illuminance ConverterLux, foot-candles and phot
- Kinematic Viscosity Converterm²/s, stokes and centistokes
- Luminous Flux ConverterLumens, and how they relate to lux
- Magnetic Field ConverterTesla, gauss and their multiples
- Power ConverterWatts, kilowatts, horsepower and BTU/h
- Pressure ConverterPSI, bar, atm, kPa, mmHg and more
- Radiation Dose ConverterSieverts, rem, grays and rad
- Surface Tension ConverterN/m, mN/m and dyn/cm
- Thermal Conductivity ConverterW/(m·K), BTU/(hr·ft·°F) and more
- Torque ConverterNewton-meters, pound-feet and more
- Viscosity ConverterPascal-seconds, poise and centipoise
- Wire Gauge CalculatorAWG to wire diameter and area
Data, Numbers & Money 7 converters
- Currency ConverterConvert between 40 world currencies
- Data Storage ConverterBytes, KB, MB, GB, TB and PB
- Data Transfer Rate ConverterBits and bytes per second
- Dimensional Analysis CalculatorUnit conversion, step by step
- Metric Prefix ConverterNano, micro, milli, kilo, mega and more
- Number Base ConverterBinary, octal, decimal and hex
- Roman Numeral ConverterNumbers to Roman numerals and back