Miles to KM Converter
Type miles to get kilometers. A mile is exactly 1.609344 km, so a marathon’s 26.2 miles is about 42.2 km.
26.2 mi =
42.1648km
26.2 miles is 42.1648 kilometers.
- 1 mi
- 1.6093 km
- 1 km
- 0.6214 mi
How to convert miles to km
Multiply miles by 1.609344. A statute mile is 5,280 feet, and 5,280 × 0.3048 m is exactly 1,609.344 m, so 250 miles of driving is 402.336 km.
A quarter mile is 402.3 m, just over one lap of a 400 m running track.
Running paces convert with the same factor. A mile in 8 minutes is 8 ÷ 1.609344 = 4.97 minutes per kilometer, or about 4 min 58 s per km.
kilometers = miles × 1.609344
- The nautical mile used at sea and in aviation is a separate unit of exactly 1,852 m, about 15% longer than the 1,609.344 m statute mile. Source: NIST SP 811, Appendix B.8: conversion factors by unit.
How to estimate miles to km in your head
Add 60%: take the miles, add half, then add a tenth. 100 miles becomes 100 + 50 + 10 = 160 km, close to the exact 160.93.
A few anchors help: 1 mile is about 1.6 km, 10 miles about 16 km, and 60 miles about 97 km. Speeds scale the same way, so a 70 mph limit is roughly 113 km/h.
Miles to kilometers chart
From a quarter mile to 1,000 miles, in kilometers.
| Miles (mi) | Kilometers (km) | Example |
|---|---|---|
| 0.25 | 0.4023 | a quarter mile |
| 0.5 | 0.8047 | |
| 1 | 1.6093 | |
| 2 | 3.2187 | |
| 3 | 4.828 | |
| 3.1 | 4.989 | about a 5K |
| 5 | 8.0467 | |
| 6.2 | 9.9779 | about a 10K |
| 10 | 16.0934 | |
| 13.1 | 21.0824 | half marathon, rounded |
Show all 24 rowsShow fewer
| 15 | 24.1402 | |
| 20 | 32.1869 | |
| 25 | 40.2336 | |
| 26.2 | 42.1648 | marathon, rounded |
| 30 | 48.2803 | |
| 50 | 80.4672 | |
| 60 | 96.5606 | |
| 100 | 160.9344 | |
| 150 | 241.4016 | |
| 200 | 321.8688 | |
| 250 | 402.336 | |
| 300 | 482.8032 | |
| 500 | 804.672 | |
| 1,000 | 1,609.344 |
Frequently Asked Questions
How many km is 1 mile?
Exactly 1.609344 km, or 1,609.344 m.
How many km is 13.1 miles?
13.1 miles is 21.08 km. The official half marathon is 21.0975 km, so 13.1 is a rounded label.
Are UK road miles the same as US miles?
Yes. UK road signs and US highways both use the international statute mile of 1,609.344 m.
How many km is a 5-mile run?
Five miles is 8.05 km, so it sits between an 8K and a 10K race. Three miles, by comparison, is 4.83 km, a little short of a 5K.
How many km is 100 miles?
100 miles is 160.93 km. Ultrarunners call the 100-mile distance a “hundred”, and the metric equivalent they quote is about 161 km.