Calculator tools
Unit Converter
Length, weight, area, volume, temperature, speed, data storage and time — eight unit families in one page.
Type into any unit and the others update instantly.
Common conversions
- 1 Meter (m) = 3.280839895 Foot (ft)
- 1 Mile (mi) = 1.609344 Kilometer (km)
- 1 Inch (in) = 2.54 Centimeter (cm)
- 1 Kilometer (km) = 0.6213711922 Mile (mi)
- 1 Nautical mile (nmi) = 1.852 Kilometer (km)
The base unit is the meter. Imperial factors are exact by definition: an inch is 25.4 mm and a mile is 1609.344 m.
Type into any unit and the others update instantly.
Common conversions
- 1 Kilogram (kg) = 2.204622622 Pound (lb)
- 1 Pound (lb) = 453.59237 Gram (g)
- 1 Jin (斤) = 500 Gram (g)
- 1 Ounce (oz) = 28.34952313 Gram (g)
- 1 Metric ton (t) = 1000 Kilogram (kg)
The base unit is the kilogram. The Chinese 斤 is defined as exactly 500 g and 两 as 50 g.
Type into any unit and the others update instantly.
Common conversions
- 1 Hectare (ha) = 10000 Square meter (m²)
- 1 Mu (亩) = 666.6666667 Square meter (m²)
- 1 Acre (ac) = 4046.856422 Square meter (m²)
- 1 Square meter (m²) = 10.76391042 Square foot (ft²)
- 1 Square kilometer (km²) = 100 Hectare (ha)
The base unit is the square meter. A 亩 is 2000/3 m², so it never rounds to a neat decimal.
Type into any unit and the others update instantly.
Common conversions
- 1 Cubic meter (m³) = 1000 Liter (L)
- 1 US gallon (gal) = 3.785411784 Liter (L)
- 1 Cubic foot (ft³) = 28.31684659 Liter (L)
- 1 Imperial gallon (imp gal) = 4.54609 Liter (L)
- 1 US pint (pt) = 473.176473 Milliliter (mL)
The base unit is the liter. US and imperial gallons differ: 3.785 L against 4.546 L.
Type into any unit and the others update instantly.
Common conversions
- 0 Celsius (°C) = 32 Fahrenheit (°F)
- 100 Celsius (°C) = 212 Fahrenheit (°F)
- 37 Celsius (°C) = 98.6 Fahrenheit (°F)
- -40 Celsius (°C) = -40 Fahrenheit (°F)
- 0 Celsius (°C) = 273.15 Kelvin (K)
Temperature scales do not share a zero point, so these conversions add or subtract before scaling rather than multiplying by a factor.
Type into any unit and the others update instantly.
Common conversions
- 1 Meter per second (m/s) = 3.6 Kilometer per hour (km/h)
- 1 Mile per hour (mph) = 1.609344 Kilometer per hour (km/h)
- 1 Knot (kn) = 1.852 Kilometer per hour (km/h)
- 1 Kilometer per hour (km/h) = 0.2777777778 Meter per second (m/s)
- 1 Meter per second (m/s) = 2.236936292 Mile per hour (mph)
The base unit is the meter per second. One knot is one nautical mile per hour, exactly 1852 m/h.
Type into any unit and the others update instantly.
Common conversions
- 1 Byte (B) = 8 Bit (bit)
- 1 Kilobyte (KB) = 1000 Byte (B)
- 1 Kibibyte (KiB) = 1024 Byte (B)
- 1 Gigabyte (GB) = 0.9313225746 Gibibyte (GiB)
- 1 Terabyte (TB) = 931.3225746 Gibibyte (GiB)
Decimal units (KB, MB, GB) step by 1000, binary units (KiB, MiB, GiB) step by 1024. A 1 TB drive shows about 931 GiB for this reason.
Type into any unit and the others update instantly.
Common conversions
- 1 Hour (h) = 3600 Second (s)
- 1 Day (d) = 24 Hour (h)
- 1 Week (wk) = 7 Day (d)
- 1 Year (365 days) (yr) = 365 Day (d)
- 1 Minute (min) = 60 Second (s)
The base unit is the second. A month is treated as 30 days and a year as 365 days, since calendar months vary in length.