Convert speed between metric and imperial units including kilometers per hour, miles per hour, meters per second, feet per second, and knots.
Enter a value to convert.
| Unit | Equals |
|---|---|
| 1 Meter per Second | 3.6 Kilometers per Hour |
| 1 Kilometer per Hour | 0.277778 Meters per Second |
| 1 Mile per Hour | 1.609344 Kilometers per Hour |
| 1 Mile per Hour | 0.44704 Meters per Second |
| 1 Foot per Second | 0.3048 Meters per Second |
| 1 Knot | 1.852 Kilometers per Hour |
| 1 Knot | 1.15078 Miles per Hour |
A speed converter changes a rate of travel from one unit to another while representing the same physical speed — 100 km/h and about 62.14 mph describe the same rate of motion, just counted in different units. It's useful for moving between metric and imperial units, or into specialized units like knots used in aviation and marine navigation.
The SI unit of speed, built from the base units of distance and time. Commonly used in physics and engineering.
The standard road-speed unit in most of the world. 1 km/h ≈ 0.277778 m/s.
The standard road-speed unit in the US and UK. 1 mph = 1.609344 km/h.
Used in some US engineering and ballistics contexts. 1 ft/s = 0.3048 m/s.
A knot is one nautical mile per hour. It's the standard speed unit in aviation and marine navigation because a nautical mile is tied to the Earth's geography — one minute of latitude — making it convenient for plotting distance on a nautical chart.
Speed conversions come up when driving abroad and reading a speedometer or road signs in an unfamiliar unit, understanding running or cycling pace in a different context, aviation where airspeed is typically quoted in knots, marine navigation where vessel speed is measured in knots, and reading weather or wind-speed reports that mix mph, km/h, and knots.
Divide the number of kilometers per hour by 1.609344, or multiply by 0.621371, to get miles per hour. You can also select Kilometers per Hour as the "From" unit and Miles per Hour as the "To" unit above and enter your value.
100 km/h is approximately 27.7778 meters per second.
One knot is approximately 1.15078 miles per hour.
60 mph is approximately 96.5606 km/h.
A knot is one nautical mile per hour (1.852 km/h), used in aviation and marine navigation. Mph is one statute mile per hour (1.609344 km/h), used for road speeds. A knot is slightly faster than a mph.
Multiply meters per second by 3.6 to get kilometers per hour.
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