Convert Miles per Hour to Kilometers per Hour
Convert miles per hour to kilometers per hour instantly. Type a value below, check the formula and table, then see how the same mph to km/h conversion looks as a single line in Notes Calculator.
Miles per Hour to Kilometers per Hour formula
One mile per hour is 1.60934 kilometers per hour, so km/h = mph × 1.60934. For the reverse, multiply kilometers per hour by 0.621371, or use the Kilometers per Hour to Miles per Hour converter.
Miles per Hour to Kilometers per Hour conversion table
| Miles per Hour (mph) | Kilometers per Hour (km/h) |
|---|---|
| 1 | 1.60934 |
| 2 | 3.21869 |
| 5 | 8.04672 |
| 10 | 16.0934 |
| 20 | 32.1869 |
| 25 | 40.2336 |
| 50 | 80.4672 |
| 100 | 160.934 |
| 250 | 402.336 |
| 500 | 804.672 |
| 1,000 | 1,609.34 |
Miles per Hour to Kilometers per Hour in Notes Calculator
Notes Calculator is a notepad that does math. Write 100 mi/h to km/h on any line and the answer appears beside it. Change the number and the result follows. The same works with in and as, and with values stored in variables, so a whole estimate can mix miles per hour and kilometers per hour without a separate converter.
| Note | Result |
|---|---|
| 100 mi/h to km/h | 160.93 km/h |
| 100 mi/h in km/h | 160.93 km/h |
| 10 km/h as mi/h | 6.21 mph |
See the unit conversion docs for mixing units in one expression, or open the free web app and try it.
FAQ
Frequently asked questions
- One mile per hour equals 1.60934 kilometers per hour. To convert miles per hour to kilometers per hour, multiply by 1.60934; to go back, multiply by 0.621371.
- Type the value, the unit, and the target unit on one line: 100 mi/h to km/h. The keywords to, in, and as all work, and the result updates as you type. You can also keep the value in a variable and convert it later.
- Yes. The converter on this page is free, and Notes Calculator has a free plan for the web, Mac, Windows, Linux, and Android with the same unit conversions built in.
How many kilometers per hour are in one mile per hour?
How do I convert miles per hour to kilometers per hour in Notes Calculator?
Is this miles per hour to kilometers per hour converter free?
Convert miles per hour to kilometers per hour without leaving your notes.
Notes Calculator is free to start and runs in your browser. Units, currencies, percentages, and variables in one plain-text notepad.
Free forever plan · No credit card · Cross-platform