Kilometres to Miles Converter (km to mi)
Convert kilometres to miles instantly. 1 km = 0.6214 mi. Includes the formula, a full conversion table and a calculator that works offline.
The formula
To convert kilometres to miles, multiply by 0.6214:
mi = km × 0.6214Going the other way, divide instead — or multiply by 1.609, which is the same thing:
km = mi × 1.609Kilometres to Miles conversion table
| Kilometres | Miles |
|---|---|
| 1 km | 0.6214 mi |
| 2 km | 1.243 mi |
| 3 km | 1.864 mi |
| 4 km | 2.485 mi |
| 5 km | 3.107 mi |
| 6 km | 3.728 mi |
| 7 km | 4.35 mi |
| 8 km | 4.971 mi |
| 9 km | 5.592 mi |
| 10 km | 6.214 mi |
| 15 km | 9.321 mi |
| 20 km | 12.427 mi |
| 25 km | 15.534 mi |
| 30 km | 18.641 mi |
| 40 km | 24.855 mi |
| 50 km | 31.069 mi |
| 75 km | 46.603 mi |
| 100 km | 62.137 mi |
| 250 km | 155.34 mi |
| 500 km | 310.69 mi |
| 1000 km | 621.37 mi |
Miles to Kilometres
| Miles | Kilometres |
|---|---|
| 1 mi | 1.609 km |
| 2 mi | 3.219 km |
| 3 mi | 4.828 km |
| 4 mi | 6.437 km |
| 5 mi | 8.047 km |
| 6 mi | 9.656 km |
| 7 mi | 11.265 km |
| 8 mi | 12.875 km |
| 9 mi | 14.484 km |
| 10 mi | 16.093 km |
What that actually looks like
A conversion factor is hard to judge on its own. These are quantities most people already have a feel for, converted for you:
- A 5K run is 5 kilometres — 3.107 mi
- A marathon is 42.195 kilometres — 26.219 mi
- London to Paris is 344 kilometres — 213.75 mi
- A daily walk target is often 8 kilometres — 4.971 mi
Why both units are still in use
Almost every country measures length in metres and centimetres. The United States is the significant exception, and the United Kingdom is genuinely split: road signs are in miles, a person's height is in feet and inches, but a bottle of water is in millilitres and a running race is in kilometres. That is why this conversion comes up so often — not because one system is replacing the other, but because both are in daily use side by side.
Mistakes worth avoiding
The most common mistake is mixing feet and inches in one number. Five foot ten is 5.833 feet, not 5.10 — the inches are twelfths, not hundredths. Convert the inches separately, or work in inches throughout and divide at the end.
The other habit worth breaking is rounding too early. Convert first, round once at the end, and you avoid the drift that turns a small approximation into a visible error by the third calculation.
Doing it in your head
When you only need a rough answer, multiply by 5 and divide by 8 — which lands within 0.6 percent of the true value. Ten kilometres works out at roughly 6.25 miles that way, against 6.214 exactly. An estimate is enough for deciding whether something will fit or whether a figure sounds plausible. When the number has to be right — because you are buying, cooking or building to it — use the calculator and let it carry the decimals.
Common questions
How many miles are in one kilometre?
One kilometre equals 0.6214 miles. The calculator above handles any value, including decimals and very large numbers, and updates as you type.
Is this an exact conversion?
The factor is accurate to the precision shown, which is far beyond what any practical measurement requires. The table rounds for readability; the calculator does not.
Does this work offline?
Yes. The conversion runs in your browser with no network request, so it works on a plane, in a basement, or on a phone with no signal once the page has loaded.