Speed converter
mph, km/h, knots and metres per second.
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 it works
Everything converts through metres per second. A mile is 1,609.344 m, so 1 mph is 0.44704 m/s, and 1 km/h is 1/3.6 m/s. To go from mph to km/h, multiply by 1.609344.
Worked example
40 miles per hour is 64.3738 km/h (40 × 1.609344).
Miles per hour to kilometres per hour chart
| mph | 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 |
Popular conversions
Questions
What is 70 mph in km/h?
About 112.7 km/h. 30 mph is 48.3 km/h and 50 mph is 80.5 km/h.
How do I convert km/h to mph quickly?
Multiply by 0.6 for a close estimate (exactly 0.621). 100 km/h is about 62 mph.
What is a knot?
One nautical mile per hour: 1.852 km/h or about 1.15 mph. It's used for boats, aircraft and wind speed.