KM/H to MPH Converter
Convert kilometers per hour to miles per hour instantly. 1 km/h = 0.6213711922 mph, worked steps and a full reference table.
How to use it
- Type the value in kilometers per hour — the result updates as you type.
- Use Swap to flip the direction, or change either dropdown to convert between any two units.
- Click the result to copy it. The URL updates too, so you can bookmark or share the exact conversion.
Examples
| 1 km/h | 0.6213711922 mph |
| 5 km/h | 3.106855961 mph |
| 10 km/h | 6.213711922 mph |
| 100 km/h | 62.13711922 mph |
One kilometers per hour equals 0.62137119 miles per hours (mph). To convert kilometers per hours to miles per hours, multiply by 0.62137119; to go back the other way, multiply by 1.609344 instead.
The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.
What kilometers per hours and miles per hours actually measure
Kilometers per hour (km/h) — Kilometres per hour is the everyday metric speed unit. Road speed limits and vehicle speedometers in most countries.
Miles per hour (mph) — Miles per hour. Road speeds in the US and UK.
KM/H to MPH conversion table
The most common values, worked out in advance. Anything not listed can be typed straight into the converter.
| km/h | mph |
|---|---|
| 1 km/h | 0.62137119 mph |
| 2 km/h | 1.2427424 mph |
| 5 km/h | 3.106856 mph |
| 10 km/h | 6.2137119 mph |
| 25 km/h | 15.53428 mph |
| 50 km/h | 31.06856 mph |
| 100 km/h | 62.137119 mph |
How to convert kilometers per hours to miles per hours by hand
Multiply the number of kilometers per hours by 0.62137119.
For example, 25 km/h × 0.62137119 = 15.53428 mph.
Going the other way, divide by 0.62137119 — or multiply by 1.609344, which is the same thing and easier to do in your head.
Everything runs in your browser
There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.
Questions people ask
How many mph are in 1 km/h?
1 km/h equals exactly 0.6213711922 mph. Multiply any value in kilometers per hour by 0.6213711922 to get miles per hour.
Is anything uploaded to a server?
No. The whole calculation happens in your browser. Nothing is sent anywhere, and the page keeps working offline once loaded.
Last updated 18 August 2026