km/h to mph
Convert km/h to mph instantly, with a reference table.
km/h to mph at a glance
km/h to mph is a free online converter you can use right now to convert km/h to mph instantly, with a reference table โ no account, no install and no usage limit. It runs entirely inside your browser, so whatever you enter stays on your own device.
- Price
- Free โ no trial, no paid tier, no watermark
- Sign-up
- Not required
- Where it runs
- In your browser โ nothing is uploaded to a server
- Works on
- Chrome, Safari, Firefox and Edge โ desktop, tablet and phone
- Category
- Unit Conversions
km/h to mph conversion table
| km/h (km/h) | mph (mph) |
|---|---|
| 1 km/h | 0.621371 mph |
| 2 km/h | 1.242743 mph |
| 3 km/h | 1.864114 mph |
| 5 km/h | 3.106856 mph |
| 10 km/h | 6.213712 mph |
| 25 km/h | 15.534281 mph |
| 50 km/h | 31.068562 mph |
| 100 km/h | 62.137124 mph |
| 500 km/h | 310.68562 mph |
| 1000 km/h | 621.37124 mph |
About km/h to mph
Convert km/h to mph instantly, with a reference table of common values. The factor is exact: 1 km/h = 0.621371242 mph.
The conversion drivers need when reading a metric speedometer or road sign and thinking in miles per hour โ or when relating a metric vehicle specification to a US audience.
Kilometres per hour combines the metric distance unit with the hour, an ancient time division that the metric system never successfully replaced โ decimal time was attempted during the French Revolution and abandoned. It is the speed unit on road signs and vehicle speedometers in most of the world. A brisk walk is about 5 km/h, and typical motorway limits sit between 100 and 130 km/h.
Worked through with real numbers: 10 km/h is 6.214 mph, 50 km/h is 31.069 mph, 100 km/h is 62.137 mph.
As for the other side of the conversion: A typical US highway limit is 65 to 70 mph, and a UK motorway limit is 70 mph.
Every speed unit is a distance divided by a time, so converting between them means converting the distance and the time together. That is why the factors are less memorable than simple length conversions.
How to use km/h to mph
- Enter the number of km/h you want to convert.
- The equivalent in mph appears instantly โ there is no button to press.
- Check the reference table for common km/h to mph values.
Frequently asked questions
How do I convert km/h to mph?
Multiply your km/h figure by 0.621371242 to get mph โ or type a value above and read the answer straight off.
How many mph are in one km/h?
1 km/h = 0.621371242 mph.
When would I need to convert km/h to mph?
The conversion drivers need when reading a metric speedometer or road sign and thinking in miles per hour โ or when relating a metric vehicle specification to a US audience.
What is a km/h, exactly?
Kilometres per hour combines the metric distance unit with the hour, an ancient time division that the metric system never successfully replaced โ decimal time was attempted during the French Revolution and abandoned. A brisk walk is about 5 km/h, and typical motorway limits sit between 100 and 130 km/h.
Where is the mph actually used?
It is the road speed unit of the United States and the United Kingdom, and is used for wind speed in American weather reporting. A typical US highway limit is 65 to 70 mph, and a UK motorway limit is 70 mph.
Is there anything tricky about speed conversions?
Every speed unit is a distance divided by a time, so converting between them means converting the distance and the time together. That is why the factors are less memorable than simple length conversions.
Is this converter accurate?
Yes. It uses the exact standard factor of 1 km/h = 0.621371242 mph, and the conversion runs in your browser so nothing is uploaded.