Miles to KM Converter
Convert miles to kilometers and back as you type, check race distances like 5K and 10K in miles, and switch a running pace between min/mile and min/km.
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- Miles
- 10 mi
- Kilometers
- 16.093 km
- Meters
- 16,093 m
- Feet
- 52,800 ft
How this was calculated
- A mile is exactly 1.609344 km, so multiply: 10 × 1.609344 = 16.0934 km.
Running pace converter
A pace per mile is 1.609344 times a pace per km, so 9:00 per mile is 5:36 per km.
| Race | km | Miles | Time |
|---|---|---|---|
| 5K | 5 | 3.11 | 27:58 |
| 10K | 10 | 6.21 | 55:55 |
| 15K | 15 | 9.32 | 1:23:53 |
| Half marathon | 21.0975 | 13.11 | 1:57:59 |
| Marathon | 42.195 | 26.22 | 3:55:58 |
| 50K ultra | 50 | 31.07 | 4:39:37 |
| mi | km | mi | km | mi | km |
|---|---|---|---|---|---|
| 1 | 1.61 | 15 | 24.14 | 100 | 160.93 |
| 2 | 3.22 | 20 | 32.19 | 150 | 241.4 |
| 3 | 4.83 | 25 | 40.23 | 200 | 321.87 |
| 4 | 6.44 | 30 | 48.28 | 250 | 402.34 |
| 5 | 8.05 | 35 | 56.33 | 300 | 482.8 |
| 6 | 9.66 | 40 | 64.37 | 350 | 563.27 |
| 7 | 11.27 | 45 | 72.42 | 400 | 643.74 |
| 8 | 12.87 | 50 | 80.47 | 450 | 724.2 |
| 9 | 14.48 | 55 | 88.51 | 500 | 804.67 |
| 10 | 16.09 | 60 | 96.56 | 550 | 885.14 |
| km | mi | km | mi | km | mi |
|---|---|---|---|---|---|
| 1 | 0.62 | 15 | 9.32 | 100 | 62.14 |
| 2 | 1.24 | 20 | 12.43 | 150 | 93.21 |
| 3 | 1.86 | 25 | 15.53 | 200 | 124.27 |
| 4 | 2.49 | 30 | 18.64 | 250 | 155.34 |
| 5 | 3.11 | 35 | 21.75 | 300 | 186.41 |
| 6 | 3.73 | 40 | 24.85 | 350 | 217.48 |
| 7 | 4.35 | 45 | 27.96 | 400 | 248.55 |
| 8 | 4.97 | 50 | 31.07 | 450 | 279.62 |
| 9 | 5.59 | 55 | 34.18 | 500 | 310.69 |
| 10 | 6.21 | 60 | 37.28 | 550 | 341.75 |
How to convert miles to km
To convert miles to km, multiply by 1.609344. To convert km to miles, divide by 1.609344, which is the same as multiplying by about 0.621371. The factor is exact: the international mile is 5,280 feet, a foot is exactly 0.3048 m, so a mile is exactly 1,609.344 meters. NIST lists it as an exact relationship in Handbook 44 (Appendix C) and NIST SP 811.
Worked examples
10 miles to km: 10 × 1.609344 = 16.09 km. 5 km to miles: 5 ÷ 1.609344 = 3.11 miles, which is the length of every 5K race. 100 km to miles: 62.14 miles, and 100 km/h is likewise 62.14 mph. A marathon is 42.195 km, or 26.22 miles; the familiar "26.2" is that number rounded.
Converting running pace
A pace is time per distance, so it converts the opposite way to the distance itself. A kilometer is shorter than a mile, so the pace per km is the smaller number: divide a per-mile pace by 1.609344. An 8:00 mile is 480 seconds; 480 ÷ 1.609344 = 298 seconds, or 4:58 per km. A 5:00 per km pace is 300 × 1.609344 = 483 seconds, or 8:03 per mile. The pace converter above also shows your finish time for a 5K, 10K, half marathon and marathon at that pace. Treat these as even-pace estimates: hills, heat and fatigue make real race times slower.
Quick mental math
Kilometers to miles: multiply by 6 and divide by 10. 50 km → 30 miles (exact: 31.07). Miles to kilometers: multiply by 1.6. 20 miles → 32 km (exact: 32.19). Fibonacci numbers give a neat check too: 5 miles ≈ 8 km, 8 miles ≈ 13 km, 13 miles ≈ 21 km, because the ratio of neighbors in the sequence is close to 1.618.
Common mistakes
- Confusing statute and nautical miles. A nautical mile, used at sea and in aviation, is 1.852 km exactly, about 15% longer than a road mile.
- Converting the pace the same way as the distance. Multiplying an 8:00/mile pace by 1.609 gives 12:52, which is wrong; pace per km must be the smaller number.
- Using 1.6 for long distances. The 0.6% error is more than 9 km over 1,000 miles, enough to matter for trip planning or a car's odometer reading.
Related converters: kg to lbs, inches to cm and Celsius to Fahrenheit.
Frequently asked questions
How do you convert miles to km?
Multiply the miles by 1.609344. For example 26.2 mi × 1.609344 = 42.16 km.
How do you convert km to miles?
Divide the kilometers by 1.609344, or multiply by about 0.621371. For example 5 km ÷ 1.609344 = 3.11 mi.
How many miles is a 5K?
3.11 miles (3.1069). A 10K is 6.21 miles, a half marathon is 13.11 miles and a marathon is 26.22 miles.
How do you convert a pace from minutes per mile to minutes per km?
Divide the pace in seconds by 1.609344. An 8:00 per mile pace is 480 ÷ 1.609344 = 298 seconds, or 4:58 per km.
Is there a quick way to convert km to miles in your head?
Multiply by 6 and divide by 10: 50 km ≈ 30 mi (exact: 31.07). Going the other way, multiply miles by 1.6: 10 mi ≈ 16 km (exact: 16.09).