Speed Converter
Convert km/h, mph, metres per second, knots and feet per second.
What do you want to convert?
Show this value in every unit
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About the Speed Converter
Convert speeds for driving, sport, science homework, aviation or sailing. Road speeds are given in km/h in Pakistan and most countries, but in mph in the UK and USA; science uses metres per second, and ships and aircraft use knots.
How to use the Speed Converter
- Enter a speed.
- Choose the units to convert from and to.
- Read the result and the quick table.
How it works
Every unit is converted through metres per second:
- 1 km/h = 1 ÷ 3.6 m/s ≈ 0.2778 m/s
- 1 mph = 0.44704 m/s
- 1 knot = 0.514444 m/s (1 nautical mile per hour)
- 1 ft/s = 0.3048 m/s
Examples
- 120 km/h (motorway limit) = 74.56 mph.
- 100 km/h = 27.78 m/s.
- 60 mph = 96.56 km/h.
Frequently asked questions
How do I convert km/h to mph quickly in my head?
Multiply by 0.6 for a rough answer (100 km/h ≈ 60 mph). The exact factor is 0.621371.