Speed Converter
Convert between meters per second, kilometers per hour, miles per hour, and knots — instantly, in your browser.
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Convert between metres per second, kilometres per hour, miles per hour and knots. Calculated instantly in your browser.
How to use it
- Enter the speed.
- Choose the unit you have and the unit you want.
- Read the result.
Examples
- 100 km/h = 62.14 mph.
- 30 knots = 55.56 km/h.
- 1 m/s = 3.6 km/h.
Good to know
A knot is one nautical mile per hour, which is 1.852 km/h. It is used at sea and in aviation, and for wind speeds in many forecasts. “Knots per hour” is a common mistake, because a knot already includes the hour.
A quick rule: multiply km/h by 0.6 for mph. For running pace, which is time per distance, use the Pace Calculator. More in the speed guide.
FAQs
Which speed does a speed limit sign use?
The unit of the country you are in: miles per hour in the US and UK, kilometres per hour in most others. Convert carefully when driving abroad.