Miles to Kilometres
Type a value in miles and see it in kilometres — exact conversion, updated as you type.
Formula: kilometres = miles × 1.609344 · Reverse: kilometres to miles →
| Miles | Kilometres |
|---|---|
| 1 mi | 1.609344 km |
| 2 mi | 3.218688 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.09344 km |
| 25 mi | 40.2336 km |
| 50 mi | 80.4672 km |
| 100 mi | 160.9344 km |
About this tool
One international mile is exactly 1.609344 kilometres. Road distances, running races and speed limits cross this pair constantly — a marathon is 26.2 miles or 42.195 km, and a US 65 mph speed limit is 104.6 km/h.
Mental shortcut: multiply miles by 8 and divide by 5 (× 1.6). It is within 0.6% of the exact answer — fine for road trips, not for surveying.
How to use it
- Enter the value in miles in the box above.
- Read the result in kilometres — it updates as you type.
- Use the table for common values, or the reverse link to convert the other way.
Frequently asked questions
How do I convert miles to kilometres?
Use the formula: kilometres = miles × 1.609344. Or simply type the value into the converter above — it applies the same formula instantly.
How many km is a marathon?
A marathon is 26.219 miles, which is 42.195 kilometres.
Is this conversion exact?
Yes — the factor behind this pair is an exact international definition, and the tool shows up to 10 significant digits, so nothing is lost to rounding until the final display.