Miles per Hour to Kilometers per Hour
Convert miles per hour to kilometers per hour instantly — multiply the miles per hour by 1.609. Type in either box to convert both ways. The conversion for speed-limit signs, car dashboards and weather reports when speed is in mph but you need km/h.
Miles per Hour to Kilometers per Hour conversion table
| Miles per Hour (mph) | Kilometers per Hour (km/h) |
|---|---|
| 10 mph | 16.0934 km/h |
| 20 mph | 32.1869 km/h |
| 30 mph | 48.2803 km/h |
| 40 mph | 64.3738 km/h |
| 50 mph | 80.4672 km/h |
| 60 mph | 96.5606 km/h |
| 70 mph | 112.654 km/h |
| 80 mph | 128.748 km/h |
| 100 mph | 160.934 km/h |
How to convert miles per hour to kilometers per hour
To convert miles per hour to kilometers per hour, multiply the miles per hour by 1.609. For example, 1 mph equals 1.60934 km/h. The calculator above runs the exact factor at full precision and updates as you type, and the swap button flips the direction so you can go from kilometers per hour back to miles per hour just as quickly.
Frequently asked questions
How do you convert miles per hour to kilometers per hour?
To convert miles per hour to kilometers per hour, multiply the miles per hour by 1.609. For example, 1 mph is 1.60934 km/h. The calculator above does this for you the moment you type — enter a value on the left and the kilometers per hour result appears on the right, and you can type in either box to convert in the opposite direction. Every result uses the exact internationally defined factor, not a rounded shortcut, so the numbers are accurate enough for schoolwork, cooking, travel and engineering alike.
How many kilometers per hour are in 1 mph?
There are 1.60934 km/h in 1 mph. The conversion table on this page lists the most common values — 10 mph is 16.0934 km/h, and the table continues up to 100 mph = 160.934 km/h — so you can read off everyday amounts at a glance without typing anything.
Is this mph to km/h converter accurate?
Yes. It uses the precise, internationally agreed conversion factor rather than a rounded approximation, and the math runs at full double precision in your browser, with results shown to six significant figures. The conversion for speed-limit signs, car dashboards and weather reports when speed is in mph but you need km/h.
Is the miles per hour to kilometers per hour converter free?
Yes — it is completely free with no sign-up and no limits, and every calculation happens locally in your browser, so nothing you type is uploaded or stored. For other units, the full LK Forge unit converter covers length, weight, temperature, volume and speed in one place.
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