How to use MPH to KM/H
- Type a value in miles per hour.
- The result in kilometers per hour appears instantly.
- Type in the second box to convert the other way.
How to convert miles per hour to kilometers per hour
Multiply the value in miles per hour by 1.6093. Formula: km/h = mph × 1.6093. Example: 10 mph × 1.6093 = 16.0934 km/h.
Common miles per hour to kilometers per hour conversions
5 mph = 8.0467 km/h. 25 mph = 40.2336 km/h. 50 mph = 80.4672 km/h. 100 mph = 160.9344 km/h.
Quick mental math
Quick estimate: multiply by 1.6. 60 mph ≈ 96 km/h (exact: 96.6 km/h).
Where is mph to km/h conversion used?
Speed conversions help when driving abroad (km/h vs mph road signs), comparing car and bike specs, reading wind speeds in weather reports, running and cycling training, and boating or aviation.
What are miles per hour?
Miles per hour is the road speed unit in the US and UK.
What are kilometers per hour?
Kilometers per hour is the road speed unit in most countries.
Miles per hour to kilometers per hour conversion table
| Miles per hour (mph) | Kilometers per hour (km/h) |
|---|---|
| 1 | 1.6093 |
| 5 | 8.0467 |
| 10 | 16.0934 |
| 20 | 32.1869 |
| 30 | 48.2803 |
| 40 | 64.3738 |
| 50 | 80.4672 |
| 60 | 96.5606 |
| 70 | 112.6541 |
| 80 | 128.7475 |
| 90 | 144.841 |
| 100 | 160.9344 |
| 120 | 193.1213 |
| 150 | 241.4016 |
| 200 | 321.8688 |
Frequently asked questions
How many kilometers per hour are in 1 mile per hour?
1 mile per hour = 1.6093 kilometers per hour (1 mph = 1.6093 km/h).
How many miles per hour are in 1 kilometer per hour?
1 kilometer per hour = 0.621371 miles per hour (1 km/h = 0.621371 mph).
What is 10 mph in kilometers per hour?
10 mph = 16.0934 km/h.
What is 100 mph in kilometers per hour?
100 mph = 160.9344 km/h.
Is the mph to km/h conversion exact?
Yes. 1 mile per hour is exactly 1.609344 km/h and 1 knot is exactly 1.852 km/h, so these conversions are exact. Results are rounded only for display.
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