Unit Converter
Instant conversions across 10 categories. Type a value, pick units, get the answer.
Tip: You can also use clean URLs like /convert/m-to-ft/2.5.
Popular conversions
All units
Area
- Acre (acre)
- Hectare (ha) (ha)
- Square foot (ft²) (ft2)
- Square kilometer (km²) (km2)
- Square meter (m²) (m2)
- Square yard (yd²) (yd2)
Energy
- BTU (IT) (btu)
- Calorie (cal) (cal)
- Joule (J) (j)
- Kilocalorie (kcal) (kcal)
- Kilowatt-hour (kWh) (kwh)
- Watt-hour (Wh) (wh)
Length
- Centimeter (cm) (cm)
- Chain (ch) (ch)
- Foot (ft) (ft)
- Furlong (fur) (fur)
- Inch (in) (in)
- Kilometer (km) (km)
- Meter (m) (m)
- Mile (mi) (mi)
- Millimeter (mm) (mm)
- Nautical mile (nmi) (nmi)
- Rod (rd) (rd)
- Yard (yd) (yd)
Mass
- Gram (g) (g)
- Kilogram (kg) (kg)
- Long ton (UK) (lt)
- Milligram (mg) (mg)
- Ounce (oz) (oz)
- Pound (lb) (lb)
- Slug (slug)
- Stone (st) (st)
- Tonne (t) (t)
Power
- Horsepower (metric) (hp)
- Kilowatt (kW) (kw)
- Watt (W) (w)
Pressure
- Bar (bar)
- Pascal (Pa) (pa)
- Pounds per square inch (psi) (psi)
- Standard atmosphere (atm) (atm)
- Torr (torr)
Speed
- Kilometers per hour (km/h) (kmh)
- Knot (kn) (knot)
- Mach (sea-level approx.) (mach)
- Meters per second (m/s) (ms)
- Miles per hour (mph) (mph)
Temperature
- Celsius (°C) (celsius)
- Fahrenheit (°F) (fahrenheit)
- Kelvin (K) (kelvin)
- Rankine (°R) (rankine)
Time
- Day (day)
- Hour (h) (h)
- Minute (min) (min)
- Second (s) (s)
- Week (week)
- Year (365 d) (year)
Volume
- Barrel (oil, bbl) (bbl)
- Cubic foot (ft³) (ft3)
- Cubic inch (in³) (in3)
- Cubic meter (m³) (m3)
- Cup (US) (cup)
- Imperial gallon (gal UK) (gal_uk)
- Liter (L) (l)
- Milliliter (mL) (ml)
- Pint (US pt) (pt)
- Quart (US qt) (qt)
- Tablespoon (US) (tbsp)
- Teaspoon (US) (tsp)
- US gallon (gal) (gal)