Miles to KM Converter
Convert miles to kilometres instantly. One mile is exactly 1.609344 kilometres, which follows from the international yard of exactly 0.9144 metres.
Enter a distance below and the answer updates as you type. The formula, a running and driving distance chart and the usual questions follow.
Miles to KM converter
miles (mi)= kilometres (km)The formula
miles × 1.609344 = kilometres. To reverse it, multiply kilometres by 0.621371 to get miles.
British road signs are in miles while almost every other European country posts kilometres, so this is the conversion drivers meet first when they take a car abroad. A 70 mph motorway limit is about 113 km/h, and a 30 mph limit in a town is roughly 48 km/h.
Runners need it in the other direction. Race distances are usually metric, so a 5 km parkrun is 3.11 miles, a 10 km is 6.21 miles and a marathon of 42.195 km is the familiar 26.2 miles. For a rough mental conversion, add about 60 per cent: take the miles, add half again, then add another tenth.
Miles to kilometres chart
| Miles | Kilometres | Typical context |
|---|---|---|
| 1 mi | 1.61 km | Short walk |
| 3.11 mi | 5.00 km | parkrun distance |
| 5 mi | 8.05 km | Local commute |
| 6.21 mi | 10.00 km | 10 km race |
| 10 mi | 16.09 km | Ten-mile road race |
| 13.11 mi | 21.10 km | Half marathon |
| 26.2 mi | 42.16 km | Marathon |
| 50 mi | 80.47 km | Motorway leg |
| 100 mi | 160.93 km | Long drive |
Frequently asked questions
How many kilometres is 1 mile?
Exactly 1.609344 kilometres, normally rounded to 1.61 km.
How far is a 5 km run in miles?
Five kilometres is 3.11 miles, which is why parkrun is often described as a shade over three miles.
How do I convert mph to km/h?
Use the same factor: multiply the miles per hour by 1.609344. A 70 mph limit is about 113 km/h.
Is a nautical mile the same?
No. A nautical mile is 1.852 kilometres, used in shipping and aviation, and is about fifteen per cent longer than a statute mile.
What is a quick way to estimate in my head?
Add half the number again, then a tenth of the original. Twenty miles becomes 20 + 10 + 2, giving 32 km against a true 32.19.
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