Free unit converter
Convert anything to anything: 17 categories and 1,342 conversions, each with its formula and a chart.
Most popular conversions
- Pounds to kilogramslb → kg
- Kilograms to poundskg → lb
- Centimeters to inchescm → in
- Inches to centimetersin → cm
- Kilometers to mileskm → mi
- Miles to kilometersmi → km
- Celsius to Fahrenheit°C → °F
- Fahrenheit to Celsius°F → °C
- Fluid Ounces to gallonsfl oz → gal
- Millimeters to inchesmm → in
- Feet to metersft → m
- Meters to feetm → ft
- Grams to ouncesg → oz
- Ounces to gramsoz → g
- Gallons to litersgal → L
- Liters to gallonsL → gal
- Cups to tablespoonscup → tbsp
- Miles Per Hour to kilometers per hourmph → km/h
- Square Feet to square metersft² → m²
- Acres to square feetac → ft²
- Bar to pounds per square inchbar → psi
- Kilowatts to horsepowerkW → hp
- Watts to horsepowerW → hp
- Megabytes to gigabytesMB → GB
- Kilocalories to calorieskcal → cal
- Foot-pounds to newton-metersft·lb → N·m
- Miles Per Gallon (US) to liters per 100 kmmpg → L/100 km
- Cups to milliliterscup → mL
Quick answers
- 150 lbs to kg
- 80 kg to lbs
- 70 kg to lbs
- 180 Celsius to Fahrenheit
- 40 Celsius to Fahrenheit
- 200 Fahrenheit to Celsius
- 350 Fahrenheit to Celsius
- 15 cm to inches
- 30 cm to inches
- 50 cm to inches
- 100 mm to inches
- 750 ml to oz
- 500 ml to oz
- 100 ml to oz
- 5 km to miles
- 10 km to miles
- 60 mph to km/h
- 100 km/h to mph
- 6 feet to meters
- 100 meters to feet
- 1 gallons to liters
- 32 bar to psi
All converters
- Length
Convert between metric and imperial units of length and distance, from millimeters to miles.
139 conversions
- Weight
Convert between kilograms, pounds, ounces, grams, stone and tons.
135 conversions
- Temperature
Convert between Celsius, Fahrenheit, Kelvin and Rankine.
12 conversions
- Area
Convert between square feet, square meters, acres, hectares and other units of area.
86 conversions
- Volume
Convert between liters, gallons, cups, fluid ounces, tablespoons and cubic units.
330 conversions
- Speed
Convert between miles per hour, kilometers per hour, meters per second and knots.
30 conversions
- Time
Convert between milliseconds, seconds, minutes, hours, days, weeks, months and years.
90 conversions
- Data Storage
Convert between bytes, kilobytes, megabytes, gigabytes and terabytes, in decimal and binary units.
160 conversions
- Data Transfer Rate
Convert internet and network speeds between Mbps, Gbps and MB/s.
42 conversions
- Energy
Convert between joules, calories, kilocalories, kilowatt-hours and BTU.
72 conversions
- Power
Convert between watts, kilowatts, horsepower and BTU per hour.
42 conversions
- Pressure
Convert between psi, bar, kilopascals, atmospheres and millimeters of mercury.
110 conversions
- Force
Convert between newtons, pounds-force, kilograms-force and kilonewtons.
20 conversions
- Torque
Convert torque between newton-meters, foot-pounds and inch-pounds.
12 conversions
- Angle
Convert between degrees, radians, gradians, arcminutes and arcseconds.
30 conversions
- Frequency
Convert between hertz, kilohertz, megahertz, gigahertz and rpm.
20 conversions
- Fuel Economy
Convert fuel economy between mpg (US and UK), L/100 km and km/L.
12 conversions
- Cooking
Cups, spoons and grams for flour, sugar, butter and 20 more ingredients, plus oven temperatures.
- Height
Feet and inches to centimeters and back, with a chart from 4′0″ to 7′0″.
- Fitness
Running pace per mile and per kilometer, body weight in stone, pounds and kg, and food energy.
Why use this converter
Every conversion factor here is the exact legal definition where one exists: the inch is 2.54 cm, the pound is 0.45359237 kg, the US gallon is 231 cubic inches. Results are rounded only for display, and each pair has a page that shows the formula, a worked example and a chart you can print.
US and imperial units that share a name, like the gallon, pint and fluid ounce, are kept apart and labeled, and data sizes keep decimal (GB) and binary (GiB) units separate. Everything runs in your browser, so it works offline once the page has loaded.