Indian roads and cars use km/h, but many car reviews, cricket bowling speeds on foreign broadcasts and US websites use mph. Science uses metres per second, and ships and aircraft use knots. This converter handles all of them.
How to use the speed converter
- Enter the speed.
- Choose the unit to convert from and to.
Common conversions
| Equals | |
|---|---|
| 1 km/h | 0.2778 m/s = 0.6214 mph |
| 1 m/s | 3.6 km/h |
| 1 mph | 1.6093 km/h |
| 1 knot | 1.852 km/h |
Example
100 km/h = 100 ÷ 1.609344 = 62.14 mph, or 27.78 m/s.
| km/h | mph |
|---|---|
| 60 | 37.3 |
| 80 | 49.7 |
| 100 | 62.1 |
| 120 | 74.6 |
| 150 | 93.2 |
FAQ
How do I convert km/h to m/s?
Divide by 3.6. For example, 72 km/h ÷ 3.6 = 20 m/s.
How fast is 140 km/h in mph?
140 ÷ 1.609 = about 87 mph. A fast bowler at 140 km/h bowls at roughly 87 mph.
What is a knot?
One nautical mile per hour, which is 1.852 km/h. It is used at sea and in aviation.