Convert kilometres to miles in one step. Type a value, change the units if you need a different pair, and the answer updates as you type, with the reverse rate and a quick reference list.
Results are estimates for planning. Check the figures before you make a financial or health decision.
How to convert kilometres to miles
Multiply the number of km by 0.621371 to get mi:
mi = km × 0.621371
To go the other way, divide by 0.621371 (or multiply by 1.609344). The converter stores each unit as a multiple of a base unit, so you can also pick any other pair of units from the same group.
Worked example
Using the default values in the converter above:
| Input | Value |
|---|---|
| Value | 10 |
| From | Kilometres |
| To | Miles |
10 kilometres equals 6.213712 miles
KM to Miles reference table
| Kilometres | Miles |
|---|---|
| 1 km | 0.621371 mi |
| 2 km | 1.242742 mi |
| 5 km | 3.106856 mi |
| 10 km | 6.213712 mi |
| 20 km | 12.427424 mi |
| 50 km | 31.06856 mi |
| 100 km | 62.137119 mi |
| 500 km | 310.685596 mi |
| 1,000 km | 621.371192 mi |
Tips and common mistakes
The inch, foot, yard and mile are defined exactly in metric terms: 1 inch is 25.4 mm, 1 foot is 0.3048 m and 1 mile is 1.609344 km. The factors used here are therefore exact, and any rounding comes only from the number of digits shown.
The most common mistake is treating the part after the decimal point of a foot as inches. 5.5 ft means five and a half feet, which is 5 ft 6 in, not 5 ft 5 in. Check that you are reading a decimal and not a feet-and-inches pair.
For quick mental maths, remember that an inch is about 2.5 cm, a foot is about 30 cm, a metre is a little over 3 ft 3 in, and a mile is about 1.6 km.
Frequently asked questions
How many miles are in 1 km?
1 km equals 0.621371 miles.
How do I convert km to mi by hand?
Multiply the km figure by 0.621371. For example, 10 km × 0.621371 = 6.213712 mi.
How do I convert mi back to km?
Divide the mi figure by 0.621371, or multiply it by 1.609344. For example, 6.213712 mi is 10 km.
Is this conversion exact?
The inch, foot, yard and mile are defined exactly in metric terms, so the factor is exact. Any difference comes only from rounding.