KM to Miles Converter
Convert kilometers to miles instantly — miles = kilometers ÷ 1.609344 (exact)
1 km = 0.621 mi(miles = kilometers ÷ 1.609344 (exact))
Kilometers to Miles conversion table
| Kilometers (km) | Miles (mi) |
|---|---|
| 1 | 0.621 |
| 1.6093 | 1 |
| 2 | 1.243 |
| 5 | 3.107 |
| 10 | 6.214 |
| 21.0975 | 13.109 |
| 42.195 | 26.219 |
| 50 | 31.069 |
| 100 | 62.137 |
| 160 | 99.419 |
| 200 | 124.274 |
| 300 | 186.411 |
| 500 | 310.686 |
| 1,000 | 621.371 |
How it works
Enter a value in kilometers and it is converted to miles using the exact factor: miles = kilometers ÷ 1.609344 (exact). The conversion also works in reverse — edit either field.
KM to Miles formula
miles = kilometers ÷ 1.609344 (exact)
- km
- kilometers
- mi
- miles
Worked example
- Convert a 10 km run to miles
- miles = kilometers ÷ 1.609344 (exact)
10 ÷ 1.609344 ≈ 6.21 miles
Good to know
- The conversion factor is exact by definition (international yard and pound agreement, 1959) — rounding only comes from the decimals you keep.
- For the reverse conversion, see the KM to Miles converter below.
Related Calculators
Frequently Asked Questions
How do I convert km to miles?
Divide kilometers by 1.609344 — the exact length of a statute mile in km. A quick estimate: multiply by 0.6 (10 km ≈ 6.2 miles).
How many miles is 5 km?
A 5K race is about 3.11 miles; a 10K is about 6.21 miles.
How long is a marathon in km and miles?
A marathon is 42.195 km, which is 26.219 miles — the famous 26.2. A half marathon is 21.0975 km ≈ 13.1 miles.
Is the km-to-mile factor exact?
Yes: the international mile is defined as exactly 1,609.344 meters (5,280 feet × 0.3048 m). Any rounding is only in the decimals you keep.