Convert miles to kilometres 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 miles to kilometres
Multiply the number of mi by 1.609344 to get km:
km = mi × 1.609344
To go the other way, divide by 1.609344 (or multiply by 0.621371). 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 | 26.2 |
| From | Miles |
| To | Kilometres |
26.2 miles equals 42.164813 kilometres
Miles to KM reference table
| Miles | Kilometres |
|---|---|
| 1 mi | 1.609344 km |
| 2 mi | 3.218688 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.09344 km |
| 20 mi | 32.18688 km |
| 50 mi | 80.4672 km |
| 100 mi | 160.9344 km |
| 500 mi | 804.672 km |
| 1,000 mi | 1,609.344 km |
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 kilometres are in 1 mi?
1 mi equals 1.609344 kilometres.
How do I convert mi to km by hand?
Multiply the mi figure by 1.609344. For example, 26.2 mi × 1.609344 = 42.164813 km.
How do I convert km back to mi?
Divide the km figure by 1.609344, or multiply it by 0.621371. For example, 42.164813 km is 26.2 mi.
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.