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Kilometres and miles both measure distance, split along the metric/imperial line. Road signs, running races, car odometers and maps switch between them, so this converter turns kilometres into miles and back with the standard fixed factor.
km to Miles Converter: step-by-step worked example
How many miles is a 10 km run?
- Value
- 10
- Direction
- Kilometres → Miles
- 1
Conversion factor (definition)
1 mile = 1,760 yd × 0.9144 m = 1,609.344 m (exact)
1 mi = 1.609344 km = 1.6093 km
- 2
Inverse factor
1 km = 1 ÷ 1.609344 mi
1 ÷ 1.609344 = 0.6214 mi
- 3
Conversion
mi → km: × 1.609344 · km → mi: ÷ 1.609344
10 km ÷ 1.609344 = 6.2137 mi
- 4
Check (reverse direction)
Convert the result back with the inverse operation
6.2137 mi × 1.609344 = 10 km
- mi6.2137
- km10
- nautical mi5.3996
Good to know: Do not confuse the statute mile (1,609.344 m) with the nautical mile (1,852 m) used at sea and in aviation. Quick estimate: miles × 1.6 ≈ km.
km to Miles Converter — how it works
The conversion factor
1 mile = 1.609344 kilometres (and 1 km = 0.621371 miles).
| To convert | Do this |
|---|---|
| km → miles | multiply by 0.621371 |
| miles → km | multiply by 1.609344 |
Common values
| Kilometres | Miles |
|---|---|
| 1 km | 0.62 mi |
| 5 km | 3.11 mi |
| 10 km | 6.21 mi |
| 100 km | 62.14 mi |
Worked example
A 10 km run is 10 × 0.621371 = 6.21 miles. A 60 mph speed limit is 60 × 1.609344 = 96.6 km/h. A marathon's 42.195 km is 26.22 miles.
Miles to kilometres table
| Miles | Kilometres |
|---|---|
| 1 | 1.61 |
| 2 | 3.22 |
| 3 | 4.83 |
| 5 | 8.05 |
| 10 | 16.09 |
| 13.1 | 21.08 |
| 20 | 32.19 |
| 26.2 | 42.16 |
| 50 | 80.47 |
| 100 | 160.93 |
| 500 | 804.67 |
Kilometres to miles table
| Kilometres | Miles |
|---|---|
| 1 | 0.62 |
| 5 | 3.11 |
| 10 | 6.21 |
| 21.1 | 13.11 |
| 42.2 | 26.22 |
| 50 | 31.07 |
| 100 | 62.14 |
| 500 | 310.69 |
| 1,000 | 621.37 |
Frequently asked questions
How many miles is 1 km?+
One kilometre is 0.621371 miles — roughly five eighths of a mile. Multiply kilometres by 0.621371 to get miles.
How do I convert km to miles?+
Multiply the kilometre value by 0.621371. A rough mental shortcut is to multiply by 0.6, so 100 km ≈ 60 miles.
How do I convert miles to km?+
Multiply the mile value by 1.609344. So 26.2 miles (a marathon) is about 42.2 km.
What is 5 km in miles?+
5 km is 3.11 miles. A 5K race is therefore a little over three miles.
Is a mile longer than a kilometre?+
Yes. One mile is about 1.6 kilometres, so a mile is roughly 60% longer than a kilometre.
About this page
- Publisher:
- Kalkoro — Teknolojig Bilişim Teknolojileri A.Ş., İstanbul
- Written by:
- Ahmet Tur — Editor (Math, date & time, unit conversion, physics & chemistry, everyday tools)
- Reviewed by:
- Kübra Yıldız — Editor
Parameters come from official sources; the last update date is shown at the bottom of the page.
Spotted a wrong result? Use the "Report a bug" button at the top of the page; every report is reviewed.
How we calculate and our accuracy policy →
Results are for information only. For official matters the relevant authority's calculation prevails.
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