Unit Converter
Convert length, weight, temperature, volume, area, speed, time and data — instantly, with exact factors.
1 Kilometre (km) = 0.6213711922 Mile (mi)
1 Kilometre (km) in every length unit
| Millimetre (mm) | 1,000,000 |
| Centimetre (cm) | 100,000 |
| Metre (m) | 1,000 |
| Inch (in) | 39,370.07874 |
| Foot (ft) | 3,280.839895 |
| Yard (yd) | 1,093.613298 |
| Mile (mi) | 0.6213711922 |
| Nautical mile | 0.5399568035 |
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Exact Conversions, Not Rounded Guesses
Many quick conversions round their factors and drift on large numbers. This converter uses the exact international definitions where they exist: an inch is exactly 2.54 cm, a pound is exactly 0.45359237 kg, and a US gallon is exactly 3.785411784 litres. Temperature is converted with the proper formulas, not a fixed factor.
How to Convert Units
- Choose a category. Pick length, weight, temperature, volume, area, speed, time or data.
- Enter a value. Type the number you want to convert.
- Pick the units. Select the unit you have and the unit you want. Use the swap button to reverse them.
- Read every unit at once. The table below the converter shows your value in every other unit in that category.
Frequently Asked Questions
How many kilometres are in a mile?
One mile is exactly 1.609344 kilometres, and one kilometre is about 0.621371 miles.
How do I convert kilograms to pounds?
Multiply by 2.20462. One pound is defined as exactly 0.45359237 kg, so 1 kg is about 2.20462 lb.
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 and add 32. 100 °C is 212 °F and 0 °C is 32 °F. To go back, subtract 32 and multiply by 5/9. −40 is the same on both scales.
How big is a marla and a kanal?
This converter uses the common 225 square-foot marla (about 20.9 m²), and a kanal of 20 marla (4,500 square feet). Some areas use a different local marla, so check with the relevant land authority for legal measurements.
Why do MB and MiB give different numbers?
MB (megabyte) uses powers of 1000: 1 MB = 1,000,000 bytes. MiB (mebibyte) uses powers of 1024: 1 MiB = 1,048,576 bytes. Drive makers use MB and GB, while some operating systems report MiB and GiB, which is why a drive can look smaller than advertised.
Are US and UK gallons the same?
No. A US gallon is 3.785 litres and a UK (imperial) gallon is 4.546 litres. The converter lists both.