This tool converts distance between the international mile (mi) and the kilometer (km). It uses the exact definitions adopted internationally: 1 mile = 1,609.344 meters; 1 kilometer = 1,000 meters. Results can be rounded for readability.
Miles (mi) to Kilometers (km) Converter
Enter a value in miles and press Convert
Miles (mi)
Result in Kilometers (km)
How to use
- Enter a value in the Miles input field.
- Choose Decimal Places to control rounding (0–10).
- Select Convert to compute kilometers.
- Copy Result places the output in your clipboard.
- Clear All resets inputs and results.
- Swap lets you switch direction (you can link this button to a Kilometers to Miles page).
Unit definitions
Mile (mi). System: imperial/US customary. Exact definition: 1 mile = 5,280 feet; with the international foot defined as exactly 0.3048 m, the mile equals exactly 1,609.344 m. Common contexts include road distances in the United States and the United Kingdom. Relationship to the other unit here: 1 mi = 1.609344 km (exact). Relationship to SI base unit: 1 mi = 1,609.344 m (exact).
Kilometer (km). System: International System of Units (SI). Exact definition: 1 kilometer = 1,000 meters. Widely used worldwide for road signage, maps, athletics, and science. Relationship to the other unit here: 1 km = 0.62137119223733 mi (exact ratio from 1,000 m ÷ 1,609.344 m). Relationship to imperial/US unit: 1 km ≈ 3,280.839895 feet.
Visual comparison of kilometers and miles
Conversion formula
Miles to kilometers: kilometers = miles × 1.609344. Source: NIST – Revised Unit Conversion Factors (mile = 1,609.344 m).
Kilometers to miles: miles = kilometers ÷ 1.609344. Source derives from the same exact definition above: 1 km = 1,000 m; 1 mi = 1,609.344 m (NIST page linked).
Conversion table
| Miles (mi) | Kilometers (km) |
|---|---|
| 0.10 | 0.161 |
| 0.25 | 0.402 |
| 0.50 | 0.805 |
| 0.75 | 1.207 |
| 1 | 1.609 |
| 1.5 | 2.414 |
| 2 | 3.219 |
| 3 | 4.828 |
| 5 | 8.047 |
| 7.5 | 12.070 |
| 10 | 16.093 |
| 12 | 19.312 |
| 13.1 | 21.082 |
| 15 | 24.140 |
| 20 | 32.187 |
| 26.219 | 42.195 |
| 50 | 80.467 |
| 62.5 | 100.584 |
| 75 | 120.701 |
| 100 | 160.934 |
Real-world examples
- Marathon road race: 42.195 km = 26.219 mi.
- Standard outdoor track lap: 400 m = 0.400 km = 0.248548 mi.
- NFL field (goal line to goal line): 100 yd = 91.44 m = 0.09144 km = 0.056818 mi.
- Golden Gate Bridge total length: 2.737 km ≈ 1.701 mi.
- Channel Tunnel length: 50.45 km ≈ 31.348 mi.
- Brooklyn Bridge total length: 6,016 ft = 1.8336768 km ≈ 1.139 mi.
- Eiffel Tower height: 330 m = 0.330 km ≈ 0.205 mi.
- Hoover Dam crest length: 379 m = 0.379 km ≈ 0.2355 mi.
- 10 km road race: 10 km ≈ 6.214 mi.
- 5,000 m track event: 5.000 km ≈ 3.107 mi.
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