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Unit Converter
Convert values across 16 measurement categories in one universal tool.
Open calculatorUnit Converters
Convert everyday, scientific, digital, travel, and cooking measurements with documented constants and assumptions.
Everyday to engineering conversions
21 calculators
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Everyday Converters
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Length Converter
Convert metric, imperial, nautical, and astronomical lengths.
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Weight and Mass Converter
Convert kilograms, pounds, ounces, stones, tonnes, and more.
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Temperature Converter
Convert Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur.
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Area Converter
Convert square units, hectares, acres, and square miles.
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Volume Converter
Convert metric, US customary, and imperial liquid volumes.
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Speed Converter
Convert speed among km/h, mph, knots, m/s, and Mach.
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Time Unit Converter
Convert seconds, minutes, hours, days, weeks, and year conventions.
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Height Converter
Convert centimetres and metres to normalized feet and inches.
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Pressure Converter
Convert pascals, bar, atmospheres, torr, mmHg, and psi.
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Energy Converter
Convert joules, calories, watt-hours, BTU, and electronvolts.
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Power Converter
Convert watts, kilowatts, horsepower definitions, and BTU/h.
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Force Converter
Convert newtons, pound-force, kilogram-force, dynes, and more.
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Density Converter
Convert density units used in science, engineering, and materials.
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Angle Converter
Convert degrees, radians, gradians, turns, arc units, and milliradians.
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Frequency Converter
Convert hertz, SI multiples, RPM, RPS, and radians per second.
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Data Storage Converter
Convert bits and bytes using clearly separated SI and IEC prefixes.
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Number Base Converter
Convert exact integers among binary, octal, decimal, hexadecimal, or bases 2–36.
Open calculatorTravel and Vehicles
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Fuel Economy Converter
Convert km/L, L/100 km, US mpg, and imperial mpg.
Open calculatorHome and Lifestyle
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Cooking Measurement Converter
Convert cooking volumes and masses, including ingredient-based estimates.
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Shoe Size Converter
Compare approximate US men, US women, UK, EU, and foot-length sizes.
Open calculatorAbout unit converters
Convert among clearly labeled systems using one shared source of constants. SI and IEC digital units, US and imperial volumes, horsepower definitions, density assumptions, and approximate table-based conversions remain explicit.