mph to km/h
Convert miles per hour to kilometres per hour, with speed limits.
70 mph is
112.654 km/h
In every unit
- Kilometres per hour112.654 km/h
- Metres per second31.2928 m/s
- Knots60.8283 kn
- Feet per second102.667 ft/s
Show workings
- Conversion factor1 mph = 1.609344 km/h
- Result70 × 1.609344 = 112.654 km/h
How to convert miles per hour to kilometres per hour
For comparing UK speed limits with the km/h you see in most other countries, or reading a speedometer in km/h.
Multiply miles per hour by 1.609344.
Quick estimate: Add 60%: 50 mph ≈ 80 km/h (exactly 80.5).
Worked example
30 miles per hour is 48.2803 km/h (30 × 1.609344).
Miles per hour to kilometres per hour chart
| mph | km/h |
|---|---|
| 10 | 16.0934 km/h |
| 20 | 32.1869 km/h |
| 30 | 48.2803 km/h |
| 40 | 64.3738 km/h |
| 50 | 80.4672 km/h |
| 60 | 96.5606 km/h |
| 70 | 112.654 km/h |
| 80 | 128.748 km/h |
| 100 | 160.934 km/h |
More conversions
Questions
How many kilometres per hour is 30 mph?
30 miles per hour is 48.2803 km/h.
How many kilometres per hour is 70 mph?
70 miles per hour is 112.654 km/h.
What are the UK speed limits in km/h?
20 mph is 32 km/h, 30 mph is 48 km/h, 60 mph is 97 km/h and 70 mph is 113 km/h.