All Unit Converters
366 conversions across 10 categories.
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Length
Metric and imperial distance units. The inch has been defined as exactly 2.54 cm since 1959, so every conversion on this page is exact rather than approximate.
Millimetres to CentimetresMillimetres to MetresMillimetres to KilometresMillimetres to InchesMillimetres to FeetMillimetres to YardsMillimetres to MilesCentimetres to MillimetresCentimetres to MetresCentimetres to KilometresCentimetres to InchesCentimetres to FeetCentimetres to YardsCentimetres to MilesMetres to MillimetresMetres to CentimetresMetres to KilometresMetres to InchesMetres to FeetMetres to YardsMetres to MilesKilometres to MillimetresKilometres to CentimetresKilometres to MetresKilometres to InchesKilometres to FeetKilometres to YardsKilometres to MilesInches to MillimetresInches to CentimetresInches to MetresInches to KilometresInches to FeetInches to YardsInches to MilesFeet to MillimetresFeet to CentimetresFeet to MetresFeet to KilometresFeet to InchesFeet to YardsFeet to MilesYards to MillimetresYards to CentimetresYards to MetresYards to KilometresYards to InchesYards to FeetYards to MilesMiles to MillimetresMiles to CentimetresMiles to MetresMiles to KilometresMiles to InchesMiles to FeetMiles to Yards
Weight
Mass units. The pound is defined as exactly 0.45359237 kg, and the ounce as one sixteenth of that, so these conversions are exact.
Milligrams to GramsMilligrams to KilogramsMilligrams to TonnesMilligrams to OuncesMilligrams to PoundsMilligrams to StoneGrams to MilligramsGrams to KilogramsGrams to TonnesGrams to OuncesGrams to PoundsGrams to StoneKilograms to MilligramsKilograms to GramsKilograms to TonnesKilograms to OuncesKilograms to PoundsKilograms to StoneTonnes to MilligramsTonnes to GramsTonnes to KilogramsTonnes to OuncesTonnes to PoundsTonnes to StoneOunces to MilligramsOunces to GramsOunces to KilogramsOunces to TonnesOunces to PoundsOunces to StonePounds to MilligramsPounds to GramsPounds to KilogramsPounds to TonnesPounds to OuncesPounds to StoneStone to MilligramsStone to GramsStone to KilogramsStone to TonnesStone to OuncesStone to Pounds
Temperature
Temperature scales do not share a zero point, so they convert by formula rather than by a single multiplier.
Celsius to FahrenheitCelsius to KelvinFahrenheit to CelsiusFahrenheit to KelvinKelvin to CelsiusKelvin to Fahrenheit
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Volume
Volume units. Fluid ounces, cups, pints, quarts and gallons here are US customary, which are smaller than their imperial counterparts.
Millilitres to LitresMillilitres to Cubic metresMillilitres to US fluid ouncesMillilitres to US cupsMillilitres to US pintsMillilitres to US quartsMillilitres to US gallonsLitres to MillilitresLitres to Cubic metresLitres to US fluid ouncesLitres to US cupsLitres to US pintsLitres to US quartsLitres to US gallonsCubic metres to MillilitresCubic metres to LitresCubic metres to US fluid ouncesCubic metres to US cupsCubic metres to US pintsCubic metres to US quartsCubic metres to US gallonsUS fluid ounces to MillilitresUS fluid ounces to LitresUS fluid ounces to Cubic metresUS fluid ounces to US cupsUS fluid ounces to US pintsUS fluid ounces to US quartsUS fluid ounces to US gallonsUS cups to MillilitresUS cups to LitresUS cups to Cubic metresUS cups to US fluid ouncesUS cups to US pintsUS cups to US quartsUS cups to US gallonsUS pints to MillilitresUS pints to LitresUS pints to Cubic metresUS pints to US fluid ouncesUS pints to US cupsUS pints to US quartsUS pints to US gallonsUS quarts to MillilitresUS quarts to LitresUS quarts to Cubic metresUS quarts to US fluid ouncesUS quarts to US cupsUS quarts to US pintsUS quarts to US gallonsUS gallons to MillilitresUS gallons to LitresUS gallons to Cubic metresUS gallons to US fluid ouncesUS gallons to US cupsUS gallons to US pintsUS gallons to US quarts
Area
Area units for rooms, plots and land. An acre is defined as 4,046.8564224 m² exactly.
Square centimetres to Square metresSquare centimetres to Square kilometresSquare centimetres to Square inchesSquare centimetres to Square feetSquare centimetres to AcresSquare centimetres to HectaresSquare metres to Square centimetresSquare metres to Square kilometresSquare metres to Square inchesSquare metres to Square feetSquare metres to AcresSquare metres to HectaresSquare kilometres to Square centimetresSquare kilometres to Square metresSquare kilometres to Square inchesSquare kilometres to Square feetSquare kilometres to AcresSquare kilometres to HectaresSquare inches to Square centimetresSquare inches to Square metresSquare inches to Square kilometresSquare inches to Square feetSquare inches to AcresSquare inches to HectaresSquare feet to Square centimetresSquare feet to Square metresSquare feet to Square kilometresSquare feet to Square inchesSquare feet to AcresSquare feet to HectaresAcres to Square centimetresAcres to Square metresAcres to Square kilometresAcres to Square inchesAcres to Square feetAcres to HectaresHectares to Square centimetresHectares to Square metresHectares to Square kilometresHectares to Square inchesHectares to Square feetHectares to Acres
Speed
Speed units for driving, running and wind. A knot is one nautical mile per hour, which is why it does not line up neatly with mph.
Metres per second to Kilometres per hourMetres per second to Miles per hourMetres per second to KnotsMetres per second to Feet per secondKilometres per hour to Metres per secondKilometres per hour to Miles per hourKilometres per hour to KnotsKilometres per hour to Feet per secondMiles per hour to Metres per secondMiles per hour to Kilometres per hourMiles per hour to KnotsMiles per hour to Feet per secondKnots to Metres per secondKnots to Kilometres per hourKnots to Miles per hourKnots to Feet per secondFeet per second to Metres per secondFeet per second to Kilometres per hourFeet per second to Miles per hourFeet per second to Knots
Time
Durations from milliseconds to years. A year here is 365 days; leap years and calendar months are handled by the date calculators instead.
Milliseconds to SecondsMilliseconds to MinutesMilliseconds to HoursMilliseconds to DaysMilliseconds to WeeksMilliseconds to YearsSeconds to MillisecondsSeconds to MinutesSeconds to HoursSeconds to DaysSeconds to WeeksSeconds to YearsMinutes to MillisecondsMinutes to SecondsMinutes to HoursMinutes to DaysMinutes to WeeksMinutes to YearsHours to MillisecondsHours to SecondsHours to MinutesHours to DaysHours to WeeksHours to YearsDays to MillisecondsDays to SecondsDays to MinutesDays to HoursDays to WeeksDays to YearsWeeks to MillisecondsWeeks to SecondsWeeks to MinutesWeeks to HoursWeeks to DaysWeeks to YearsYears to MillisecondsYears to SecondsYears to MinutesYears to HoursYears to DaysYears to Weeks
Data
Digital storage in decimal (SI) units, the same convention drive manufacturers and network speeds use: 1 kB is 1,000 bytes.
Bits to BytesBits to KilobytesBits to MegabytesBits to GigabytesBits to TerabytesBits to PetabytesBytes to BitsBytes to KilobytesBytes to MegabytesBytes to GigabytesBytes to TerabytesBytes to PetabytesKilobytes to BitsKilobytes to BytesKilobytes to MegabytesKilobytes to GigabytesKilobytes to TerabytesKilobytes to PetabytesMegabytes to BitsMegabytes to BytesMegabytes to KilobytesMegabytes to GigabytesMegabytes to TerabytesMegabytes to PetabytesGigabytes to BitsGigabytes to BytesGigabytes to KilobytesGigabytes to MegabytesGigabytes to TerabytesGigabytes to PetabytesTerabytes to BitsTerabytes to BytesTerabytes to KilobytesTerabytes to MegabytesTerabytes to GigabytesTerabytes to PetabytesPetabytes to BitsPetabytes to BytesPetabytes to KilobytesPetabytes to MegabytesPetabytes to GigabytesPetabytes to Terabytes
Energy
Energy units for food, electricity and physics. The "calorie" on a nutrition label is a kilocalorie — 1,000 of the calories used in physics.
Joules to KilojoulesJoules to CaloriesJoules to KilocaloriesJoules to Watt hoursJoules to Kilowatt hoursKilojoules to JoulesKilojoules to CaloriesKilojoules to KilocaloriesKilojoules to Watt hoursKilojoules to Kilowatt hoursCalories to JoulesCalories to KilojoulesCalories to KilocaloriesCalories to Watt hoursCalories to Kilowatt hoursKilocalories to JoulesKilocalories to KilojoulesKilocalories to CaloriesKilocalories to Watt hoursKilocalories to Kilowatt hoursWatt hours to JoulesWatt hours to KilojoulesWatt hours to CaloriesWatt hours to KilocaloriesWatt hours to Kilowatt hoursKilowatt hours to JoulesKilowatt hours to KilojoulesKilowatt hours to CaloriesKilowatt hours to KilocaloriesKilowatt hours to Watt hours
Pressure
Pressure units for tyres, weather and diving. Tyre placards are usually in psi or bar; barometers report in hPa or mmHg.
Pascals to KilopascalsPascals to BarPascals to Pounds per square inchPascals to Standard atmospheresPascals to Millimetres of mercuryKilopascals to PascalsKilopascals to BarKilopascals to Pounds per square inchKilopascals to Standard atmospheresKilopascals to Millimetres of mercuryBar to PascalsBar to KilopascalsBar to Pounds per square inchBar to Standard atmospheresBar to Millimetres of mercuryPounds per square inch to PascalsPounds per square inch to KilopascalsPounds per square inch to BarPounds per square inch to Standard atmospheresPounds per square inch to Millimetres of mercuryStandard atmospheres to PascalsStandard atmospheres to KilopascalsStandard atmospheres to BarStandard atmospheres to Pounds per square inchStandard atmospheres to Millimetres of mercuryMillimetres of mercury to PascalsMillimetres of mercury to KilopascalsMillimetres of mercury to BarMillimetres of mercury to Pounds per square inchMillimetres of mercury to Standard atmospheres
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