Speed Converter
Convert between km/h, mph, m/s, ft/s and knots.
Result3.6 km/h
In all units
| Unit | Value |
|---|---|
| Metres/sec (m/s) | 1 |
| Kilometres/hour (km/h) | 3.6 |
| Miles/hour (mph) | 2.23694 |
| Feet/sec (ft/s) | 3.28084 |
| Knots (kn) | 1.94384 |
How it works
Speed shows up in km/h on European roads, mph on British and American ones, knots at sea and in the air, and m/s in physics. This converter links them all.
The base is metres per second: 1 m/s is 3.6 km/h, and 1 km/h is about 0.621 mph. A knot is one nautical mile per hour, roughly 1.852 km/h. So 100 km/h is about 62 mph or 27.8 m/s.
Use it for driving abroad, sports and running paces, weather and wind speeds, or physics and engineering calculations.
Frequently asked questions
How do I convert km/h to mph?
Multiply km/h by 0.621. So a 50 km/h urban limit is about 31 mph, and 120 km/h is about 75 mph.
What exactly is a knot?
One knot is one nautical mile per hour, about 1.852 km/h or 1.15 mph. It is used in shipping and aviation because a nautical mile ties neatly to lines of latitude.
Which unit is used in Greece?
km/h is the usual road speed unit.