mph to km/h
Convert mph to km/h instantly, with a reference table.
mph to km/h at a glance
mph to km/h is a free online converter you can use right now to convert mph to km/h 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
mph to km/h conversion table
| mph (mph) | km/h (km/h) |
|---|---|
| 1 mph | 1.609344 km/h |
| 2 mph | 3.218688 km/h |
| 3 mph | 4.828032 km/h |
| 5 mph | 8.046719 km/h |
| 10 mph | 16.093439 km/h |
| 25 mph | 40.233597 km/h |
| 50 mph | 80.467194 km/h |
| 100 mph | 160.93439 km/h |
| 500 mph | 804.67194 km/h |
| 1000 mph | 1,609.3439 km/h |
About mph to km/h
Convert mph to km/h instantly, with a reference table of common values. The factor is exact: 1 mph = 1.609343871 km/h.
Needed when driving in a metric country from a US or UK frame of reference, and for interpreting American vehicle specifications and wind speeds.
Miles per hour pairs the statute mile with the hour. It survives in the two major English-speaking countries that kept the mile for road distances. 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.
Worked through with real numbers: 10 mph is 16.093 km/h, 50 mph is 80.467 km/h, 100 mph is 160.934 km/h.
As for the other side of the conversion: A brisk walk is about 5 km/h, and typical motorway limits sit between 100 and 130 km/h.
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 mph to km/h
- Enter the number of mph you want to convert.
- The equivalent in km/h appears instantly โ there is no button to press.
- Check the reference table for common mph to km/h values.
Frequently asked questions
How do I convert mph to km/h?
Multiply your mph figure by 1.609343871 to get km/h โ or type a value above and read the answer straight off.
How many km/h are in one mph?
1 mph = 1.609343871 km/h.
When would I need to convert mph to km/h?
Needed when driving in a metric country from a US or UK frame of reference, and for interpreting American vehicle specifications and wind speeds.
What is a mph, exactly?
Miles per hour pairs the statute mile with the hour. It survives in the two major English-speaking countries that kept the mile for road distances. A typical US highway limit is 65 to 70 mph, and a UK motorway limit is 70 mph.
Where is the km/h actually used?
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.
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 mph = 1.609343871 km/h, and the conversion runs in your browser so nothing is uploaded.