How many miles in 1 km?
1 km = 0.6213711922 mi. The other way round: 1 mi = 1.609344 km. A kilometre is 1,000 metres and is the unit for road distances in almost every country except the US and the UK. The international statute mile is 1,760 yards, exactly 1,609.344 m; road signs in the US and UK use it. The nautical mile (1,852 m) is a different unit.
Kilometers to miles conversion table
1 km = 0.6214 mi · 2 km = 1.2427 mi · 3 km = 1.8641 mi · 4 km = 2.4855 mi · 5 km = 3.1069 mi · 6 km = 3.7282 mi · 7 km = 4.3496 mi · 8 km = 4.971 mi · 9 km = 5.5923 mi · 10 km = 6.2137 mi · 12 km = 7.4565 mi · 15 km = 9.3206 mi · 20 km = 12.4274 mi · 25 km = 15.5343 mi · 30 km = 18.6411 mi · 40 km = 24.8548 mi · 50 km = 31.0686 mi · 75 km = 46.6028 mi · 100 km = 62.1371 mi · 1,000 km = 621.3712 mi
How to convert kilometers to miles
Divide the value by 1.609344. Example: 37 km = 22.9907 mi.
Unit Converter
How to use
- 1Pick a category — length, weight, temperature, volume, area, speed, data, time, pressure or energy.
- 2Choose the “from” and “to” units, or press swap to reverse them.
- 3Type a value in either field — the other side updates as you type.
- 4Adjust the decimal precision and check the conversion table for common values.
Exact conversion factors
Many imperial units are defined exactly in metric terms: 1 inch = 2.54 cm, 1 foot = 0.3048 m, 1 mile = 1.609344 km, 1 pound = 0.45359237 kg and 1 US gallon = 3.785411784 litres. The converter uses these definitions, so results are as precise as the decimals you choose to show. The formula is displayed in words — for example “multiply by 2.54” — so you can repeat the calculation by hand.
Temperature is different
Celsius, Fahrenheit and Kelvin do not share a zero point, so temperature cannot be converted with a single factor. °F = °C × 9/5 + 32 and °C = (°F − 32) × 5/9; Kelvin is Celsius + 273.15. That is why 0 °C is 32 °F, while a 10-degree change in Celsius is an 18-degree change in Fahrenheit.
US vs UK units and data sizes
A US gallon (3.785 L) is smaller than an imperial UK gallon (4.546 L), and US fluid ounces differ slightly from UK ones — check which system your recipe or spec uses. For data sizes, storage makers use decimal units (1 GB = 1,000 MB), while operating systems often count in binary units (1 GiB = 1,024 MiB), which is why a new drive shows less capacity than the label.
Frequently asked questions
How many centimetres are in an inch?
Exactly 2.54 cm. To convert cm to inches, divide by 2.54.
How do I convert kg to pounds?
Multiply kilograms by about 2.20462. One pound is exactly 0.45359237 kg.
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 and add 32. For example, 20 °C × 1.8 + 32 = 68 °F.
Can I convert in both directions?
Yes. Type in either field and the other updates, or press swap to switch the units.
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