Miles to Km Converter
Convert miles to kilometres and back instantly. One mile is 1.609344 km exactly, so every conversion is precise — type any value and read off the result.
miles ↔ km
1 mile = 1.609344 km (exact).
1 mile = 1.609344 km exactly (international statute mile). Conversions are precise.
Miles and kilometres
The mile is an imperial unit; the kilometre is metric. The UK still uses miles on its roads and speed limits, while most of the world uses kilometres — so this is one of the conversions British travellers, runners and drivers reach for most. By international agreement the mile is defined as exactly 1.609344 kilometres, so converting is precise. To go from miles to km you multiply by 1.609344; from km to miles you divide by 1.609344 (or multiply by about 0.6214).
5 miles = 8.05 km (5 × 1.609344). Going the other way, 100 km = 62.14 miles. For a rough mental check, multiply miles by 1.6, or take roughly five-eighths of a kilometre figure to get miles.
Miles to km reference table
| Miles | Kilometres |
|---|---|
| 1 mile | 1.61 km |
| 5 miles | 8.05 km |
| 10 miles | 16.09 km |
| 26.2 miles | 42.20 km |
| 50 miles | 80.47 km |
| 100 miles | 160.93 km |
Based on the exact factor 1 mile = 1.609344 km. Handy for road trips, race distances and speed limits abroad.
When you'll need this
Driving abroad, reading a foreign road sign, comparing a 10K race to a 10-mile route, or working out a marathon's 42.2 km. For running pace and finish-time predictions see the running pace calculator, and to turn daily steps into distance use the steps to miles calculator. For everything else — length, weight, temperature, volume — the unit converter covers it.
Frequently asked questions
How do I convert miles to km?
Multiply the number of miles by 1.609344. For example, 10 miles × 1.609344 = 16.09 km. To go the other way, divide kilometres by 1.609344.
How many km is 5 miles?
5 miles is 8.05 km. That's 5 multiplied by the exact factor of 1.609344 km per mile, so a parkrun (5 km) is just over 3.1 miles.
How many miles is 1 km?
One kilometre is about 0.6214 miles. The exact relationship is 1 mile = 1.609344 km, which is the internationally agreed definition of the statute mile.
How do I convert km to miles?
Divide the number of kilometres by 1.609344, or multiply by about 0.6214. For example, 100 km ÷ 1.609344 = 62.14 miles.
Is there a quick way to estimate miles to km?
Yes — multiply miles by 1.6 for a close mental estimate. For an exact figure, multiply by 1.609344, which this converter does automatically.