Toolsloft

Unit Converters

134 free tools, grouped by topic.

Length

  • Acres to Square Feet ConverterConvert acres to square feet instantly, and square feet back to acres. Based on the exact 1 acre = 43560 square feet.
  • CM to Feet ConverterConvert centimeters to feet and back, with inches and meters available for height and distance.
  • CM to Inches ConverterConvert centimeters to inches instantly, and inches back to cm. Based on the exact 1 inch = 2.54 cm definition.
  • CM to MM ConverterConvert centimeters to millimeters and back, plus meters and inches.
  • Cubic Feet to Gallons ConverterConvert cubic feet to US gallons, imperial gallons, and liters. Enter the volume in cubic feet for tank and aquarium sizing.
  • Cubic Inches to Liters ConverterConvert cubic inches to liters and back. Enter a volume in cubic inches and read the result in liters, milliliters, or gallons.
  • Cubic Meters to Liters ConverterConvert cubic meters to liters instantly, and liters back to cubic meters. One cubic meter is exactly 1,000 liters.
  • Feet to CM ConverterConvert feet to centimeters instantly, and centimeters back to feet. Based on the exact 1 foot = 30.48 cm definition.
  • Feet to Inches ConverterConvert feet to inches instantly, and inches back to feet. Based on the exact 1 foot = 12 inches definition.
  • Feet to Meters ConverterConvert feet to meters instantly, and meters back to feet. Based on the exact 1 foot = 0.3048 meters definition.
  • Height cm to Feet and Inches ConverterConvert a height in centimeters to feet and inches. Enter centimeters and get whole feet, leftover inches, and decimal feet instantly.
  • Inches to CM ConverterConvert inches to centimeters instantly, and cm back to inches. Based on the exact 1 inch = 2.54 cm definition.
  • Inches to Feet ConverterConvert inches to feet instantly, and feet back to inches. One foot is exactly 12 inches.
  • Inches to Meters ConverterConvert inches to meters instantly, and meters back to inches. Based on the exact 1 inch = 2.54 cm definition.
  • Inches to MM ConverterConvert inches to millimeters instantly, and millimeters back to inches. Based on the exact 1 inch = 25.4 mm definition.
  • Kilometers to Meters ConverterConvert kilometers to meters instantly, and meters back to kilometers. One kilometer is exactly 1,000 meters.
  • KM to Miles ConverterConvert kilometers to miles instantly, and miles back to km. Based on the exact 1 mile = 1.609344 km definition.
  • L/100km to MPG ConverterConvert liters per 100 km to miles per gallon, US and imperial. Enter the L/100km value and get both mpg figures plus km per liter.
  • Length ConverterConvert length and distance between mm, cm, m, km, inches, feet, yards, and miles. Exact conversions with a one-click swap.
  • Meters to Centimeters ConverterConvert meters to centimeters instantly, and centimeters back to meters. Based on the exact 1 m = 100 cm SI definition.
  • Meters to Feet ConverterConvert meters to feet instantly, and feet back to meters. Based on the exact 1 ft = 0.3048 m definition.
  • Meters to Yards ConverterConvert meters to yards instantly, and yards back to meters. Based on the exact 1 yd = 0.9144 m definition.
  • Microns to Millimeters ConverterConvert microns to millimeters and back. Enter a length in microns and read the result in millimeters, centimeters, or meters.
  • Miles to Feet ConverterConvert miles to feet instantly, and feet back to miles. Based on the exact 1 mile = 5280 ft definition.
  • Miles to KM ConverterConvert miles to kilometers instantly, and km back to miles. Based on the exact 1 mile = 1.609344 km definition.
  • Miles to Meters ConverterConvert miles to meters instantly, and meters back to miles. Based on the exact 1 mile = 1609.344 m definition.
  • MM to Inches ConverterConvert millimeters to inches instantly, and inches back to mm. Based on the exact 1 in = 25.4 mm definition.
  • Nautical Miles to Miles ConverterConvert nautical miles to statute miles instantly, and back. Based on 1 nmi = 1852 m and 1 mile = 1609.344 m.
  • Square Feet to Acres ConverterConvert square feet to acres and back. Enter an area in square feet and read the result in acres, square meters, or hectares.
  • Square Feet to Square Meters ConverterConvert square feet to square meters and back, for floor plans, land, and room sizes.
  • Square Meters to Square Feet ConverterConvert square meters to square feet and back, for floor plans, land, and room sizes.
  • Yards to Meters ConverterConvert yards to meters instantly, and meters back to yards. Based on the exact 1 yd = 0.9144 m definition.

Weight & Mass

  • Force ConverterConvert force between newtons, kilonewtons, pounds-force, kilograms-force, dynes, and more.
  • Grams to Kilograms ConverterConvert grams to kilograms instantly, and kilograms back to grams. One kilogram is exactly 1,000 grams.
  • Grams to Milligrams ConverterConvert grams to milligrams instantly, and milligrams back to grams. Based on the exact 1 g = 1000 mg SI definition.
  • Grams to Ounces ConverterConvert grams to ounces instantly, and ounces back to grams. Based on the exact 1 ounce = 28.349523125 g definition.
  • Grams to Pounds ConverterConvert grams to pounds instantly, and pounds back to grams. Based on the exact 1 pound = 453.59237 grams definition.
  • KG to Lbs ConverterConvert kilograms to pounds instantly, and pounds back to kg. Based on the exact 1 lb = 0.45359237 kg definition.
  • Kg to Newtons ConverterConvert kilograms of mass to weight in newtons using standard gravity. Enter the mass and get newtons and pounds-force.
  • KG to Stone ConverterConvert kilograms to stone instantly, and stone back to kilograms. Based on 1 stone = 14 pounds = 6.35029318 kg.
  • Kilograms to Grams ConverterConvert kilograms to grams instantly, and grams back to kilograms. One kilogram is exactly 1,000 grams.
  • Lbs to KG ConverterConvert pounds to kilograms instantly, and kg back to pounds. Based on the exact 1 lb = 0.45359237 kg definition.
  • Lbs to Ounces ConverterConvert pounds to ounces instantly, and ounces back to pounds. Based on the exact 1 lb = 16 oz definition.
  • Lbs to Stones ConverterConvert pounds to stones instantly, and stones back to pounds. Based on the exact 1 stone = 14 lb definition.
  • Mcg to Mg ConverterConvert micrograms to milligrams and back. Enter a dose in mcg and read the result in milligrams or grams.
  • Milligrams to Grams ConverterConvert milligrams to grams instantly, and grams back to milligrams. Based on the exact 1 g = 1000 mg SI definition.
  • Newtons to Kg ConverterConvert newtons to kilograms-force and back. Enter a force in newtons and read the kilograms-force and pounds-force.
  • Newtons to Pounds ConverterConvert newtons to pounds-force and back. Enter a force in newtons and read the result in pounds-force and kilograms-force.
  • Ounces to Grams ConverterConvert ounces to grams and back, plus kilograms and pounds, for cooking and shipping.
  • Ounces to Lbs ConverterConvert ounces to pounds instantly, and pounds back to ounces. Based on the exact 1 lb = 16 oz definition.
  • Pounds to Grams ConverterConvert pounds to grams instantly, and grams back to pounds. Based on the exact 1 lb = 453.59237 g definition.
  • Pounds to Newtons ConverterConvert pounds-force to newtons and back. Enter a force in pounds-force and read the result in newtons and kilonewtons.
  • Stones to Kilograms ConverterConvert stones to kilograms and back, plus pounds, for body weight and more.
  • Stones to Pounds ConverterConvert stones to pounds and back, plus kilograms, for body weight.
  • Tons to Kilograms ConverterConvert metric tons to kilograms and back. Enter a mass in tonnes and read the result in kilograms, grams, or pounds.
  • Weight ConverterConvert weight and mass between kg, g, mg, tons, pounds, ounces, and stone. Exact conversions with a one-click swap.

Temperature

Volume

  • Cups to ML ConverterConvert US cups to milliliters instantly, and milliliters back to cups. Based on 1 US customary cup = 236.5882365 mL.
  • Cups to Ounces ConverterConvert cups to fluid ounces instantly, and fluid ounces back to cups. One US cup is exactly 8 fluid ounces.
  • Cups to Tablespoons ConverterConvert cups to tablespoons instantly, and tablespoons back to cups. One US cup is exactly 16 tablespoons.
  • Gallons to Cups ConverterConvert US gallons to cups instantly, and cups back to gallons. Based on the exact 1 US gallon = 16 cups definition.
  • Gallons to Liters ConverterConvert US gallons to liters instantly, and liters back to gallons. Based on 1 US gallon = 3.785411784 liters.
  • Gallons to Quarts ConverterConvert US gallons to quarts instantly, and quarts back to gallons. One gallon is exactly 4 quarts.
  • Liters to Gallons ConverterConvert liters to US gallons instantly, and gallons back to liters. Based on 1 US gallon = 3.785411784 liters.
  • Liters to Milliliters ConverterConvert liters to milliliters instantly, and milliliters back to liters. Based on the exact 1 L = 1000 mL definition.
  • ML to Cups ConverterConvert milliliters to US cups instantly, and cups back to milliliters. Based on 1 US customary cup = 236.5882365 mL.
  • ML to Liters ConverterConvert milliliters to liters instantly, and liters back to milliliters. Based on the exact 1 liter = 1000 mL definition.
  • ML to Oz ConverterConvert milliliters to US fluid ounces instantly, and fluid ounces back to mL. Based on 1 US fluid ounce = 29.5735295625 mL.
  • Ounces to Cups ConverterConvert US fluid ounces to cups instantly, and cups back to fluid ounces. Based on the exact 1 cup = 8 fl oz definition.
  • Ounces to Milliliters ConverterConvert fluid ounces to milliliters and back, plus liters and cups, using US measures.
  • Pints to Cups ConverterConvert US pints to cups instantly, and cups back to pints. Based on the exact 1 US pint = 2 cups definition.
  • Quarts to Cups ConverterConvert US quarts to cups instantly, and cups back to quarts. Based on the exact 1 US quart = 4 cups definition.
  • Tablespoons to mL ConverterConvert tablespoons to milliliters and back. Enter a number of tablespoons and read the result in mL, teaspoons, or cups.
  • Tablespoons to Teaspoons ConverterConvert tablespoons to teaspoons instantly, and back. Based on the exact 1 US tablespoon = 3 teaspoons definition.
  • Teaspoons to Milliliters ConverterConvert US teaspoons to milliliters instantly, and back. Based on the US customary gallon of 3.785411784 liters.
  • Volume ConverterConvert volume between liters, milliliters, cups, tablespoons, fluid ounces, pints, quarts, and US gallons.

Area

  • Acres to Hectares ConverterConvert acres to hectares instantly, and hectares back to acres. Based on 1 acre = 4046.8564224 m2 and 1 hectare = 10000 m2.
  • Area ConverterConvert area between square meters, square feet, acres, hectares, square miles, and more. Exact conversions.
  • Hectares to Acres ConverterConvert hectares to acres instantly, and acres back to hectares. Based on the exact acre and hectare definitions.

Speed

  • KMH to MPH ConverterConvert kilometers per hour to miles per hour instantly, and back. Based on the exact 1 mile = 1609.344 m definition.
  • Knots to KMH ConverterConvert knots to kilometers per hour instantly, and back. Based on the exact 1 knot = 1.852 km/h definition.
  • Knots to MPH ConverterConvert knots to miles per hour instantly, and mph back to knots. Based on 1 knot = 1 nautical mile per hour = 1.150779 mph.
  • Meters per Second to KM/H ConverterConvert meters per second to kilometers per hour instantly, and back. Based on the exact 1 m/s = 3.6 km/h value.
  • Meters per Second to MPH ConverterConvert meters per second to miles per hour and back. Enter a speed in m/s and read the result in mph or km/h.
  • MPH to KMH ConverterConvert miles per hour to kilometers per hour instantly, and back. Based on the exact 1 mile = 1609.344 m definition.
  • MPH to Knots ConverterConvert miles per hour to knots instantly, and knots back to mph. Based on 1 mile = 1609.344 m and 1 nmi = 1852 m.
  • MPH to Meters per Second ConverterConvert miles per hour to meters per second instantly, and back. Based on the exact 1 mph = 0.44704 m/s value.
  • Speed ConverterConvert speed between km/h, mph, m/s, ft/s, and knots. Exact conversions with a one-click swap of direction.

Data & Digital

  • Bits to Bytes ConverterConvert bits to bytes and back, plus kilobytes, for file sizes and data rates.
  • Bytes to KB ConverterConvert bytes to kilobytes and back, using decimal (base 1000) units, with binary units available.
  • Data Storage ConverterConvert data sizes between bits, bytes, kB, MB, GB, TB and the binary KiB, MiB, GiB, TiB units.
  • Data Transfer Rate ConverterConvert data transfer rates between bps, kbps, Mbps, Gbps, and byte rates like MB/s.
  • GB to MB ConverterConvert gigabytes to megabytes instantly, and megabytes back to GB. Uses the decimal standard where 1 GB = 1000 MB.
  • GB to TB ConverterConvert gigabytes to terabytes instantly, and terabytes back to GB. Uses the decimal standard where 1 TB = 1000 GB.
  • KB to MB ConverterConvert kilobytes to megabytes instantly, and megabytes back to KB. Uses the decimal standard where 1 MB = 1000 KB.
  • MB to GB ConverterConvert megabytes to gigabytes instantly, and gigabytes back to MB. Uses the decimal standard where 1 GB = 1000 MB.
  • MB to KB ConverterConvert megabytes to kilobytes and back. Enter a size in MB and read the result in KB, GB, or bytes.
  • TB to GB ConverterConvert terabytes to gigabytes and back, using decimal (base 1000) units, with binary units available.

Energy & Power

  • BTU to Joules ConverterConvert BTU to joules and back. Enter British thermal units and read the energy in joules, kilojoules, or kilowatt-hours.
  • BTU to Watts ConverterConvert BTU per hour to watts instantly, and watts back to BTU/h. Based on 1 BTU = 1055.05585262 J.
  • Calories to Joules ConverterConvert calories and kilocalories to joules and kilojoules using the exact thermochemical calorie.
  • Calories to kJ ConverterConvert Calories (kilocalories) to kilojoules and back, the energy units used on nutrition labels.
  • Energy ConverterConvert energy between joules, kilojoules, watt-hours, kilowatt-hours, calories, kilocalories, BTU, foot-pounds, and electronvolts.
  • HP to kW ConverterConvert horsepower to kilowatts and back, using mechanical horsepower with metric horsepower available.
  • HP to Watts ConverterConvert horsepower to watts instantly, and watts back to horsepower. Based on mechanical horsepower = 745.699872 W.
  • Joules to Calories ConverterConvert joules to calories instantly, and calories back to joules. Based on the exact 1 calorie = 4.184 joules definition.
  • Kcal to kJ ConverterConvert kilocalories to kilojoules instantly, and kilojoules back to kcal. Based on the exact 1 kcal = 4.184 kJ definition.
  • kJ to kcal ConverterConvert kilojoules to kilocalories and back, the two energy units used on food labels around the world.
  • kW to HP ConverterConvert kilowatts to horsepower and back, using mechanical horsepower with metric horsepower available.
  • kWh to Joules ConverterConvert kilowatt-hours to joules and back. Enter the energy in kWh and read the result in joules, kilojoules, or megajoules.
  • Power ConverterConvert power between watts, kilowatts, megawatts, horsepower, metric horsepower, BTU per hour, and foot-pounds per second.
  • Watts to Horsepower ConverterConvert watts to horsepower and back. Enter power in watts and read the result in mechanical horsepower or kilowatts.
  • Watts to Kilowatts ConverterConvert watts to kilowatts and back. Enter power in watts and read the result in kilowatts or megawatts.

Pressure

  • ATM to PSI ConverterConvert atmospheres to psi and back, plus bar and kilopascals.
  • Bar to PSI ConverterConvert bar to psi and back, the pressure units used for tires, pumps, and gauges.
  • kPa to PSI ConverterConvert kilopascals to psi and back. Enter a pressure in kPa and read the result in psi, bar, or atmospheres.
  • Pressure ConverterConvert pressure between pascals, kilopascals, bar, psi, atmospheres, mmHg, and torr.
  • PSI to Bar ConverterConvert psi to bar and back, the pressure units used for tires, pumps, and gauges.
  • PSI to kPa ConverterConvert psi to kilopascals and back. Enter a pressure in psi and read the result in kPa, bar, or atmospheres.

Other

  • Angle ConverterConvert angles between degrees, radians, gradians, arcminutes, arcseconds, and full turns.
  • Density ConverterConvert density between kg/m3, g/cm3, g/mL, kg/L, lb/ft3, and lb/in3.
  • Frequency ConverterConvert frequency between hertz, kilohertz, megahertz, gigahertz, rpm, and radians per second.
  • Hours to Minutes ConverterConvert hours to minutes instantly, and minutes back to hours. One hour is exactly 60 minutes.
  • MPG to L/100km ConverterConvert US miles per gallon to liters per 100 km. Enter mpg and get the L/100km value plus kilometers per liter.
  • Radians to Degrees ConverterConvert radians to degrees and back, the two ways to measure angles in math and programming.
  • Time Unit ConverterConvert time between nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days, and weeks.
  • Wavelength to Frequency ConverterConvert wavelength to frequency using the speed of light. Enter a wavelength in nm, um, mm, cm, or m and get Hz, MHz, GHz, and THz.

More tools

  • Milliseconds to Seconds ConverterConvert milliseconds to seconds instantly, and seconds back to milliseconds. Based on the exact 1 s = 1000 ms definition.
  • Minutes to Seconds ConverterConvert minutes to seconds instantly, and seconds back to minutes. Based on the exact 1 minute = 60 seconds definition.
  • Seconds to Minutes ConverterConvert seconds to minutes instantly, and minutes back to seconds. Based on the exact 1 minute = 60 seconds definition.