Speed converter
This converter changes a speed between the units used on roads, in science and at sea. It is useful for comparing speed limits abroad, reading wind or boat speeds, or checking a physics answer.
- Runs in your browser
- Free, no account needed
- Copy or download the result
Result
Example
1
1 mps = 3.6 kph
How to use the speed converter
- Type a speed of zero or greater, such as 60.
- Choose the starting unit in From, such as Miles per hour (mph).
- Choose the target unit in To, such as Kilometres per hour (km/h).
- Press Run for the converted speed. Use Copy result or Download.
How it works
Supported units: metres per second, kilometres per hour, miles per hour, knots and feet per second.
One knot is one nautical mile, or 1,852 metres, per hour.
One mile per hour is exactly 0.44704 metres per second, and 1 m/s equals 3.6 km/h.
Negative speeds are rejected. Mach and the speed of light are not included.
Everything runs in your browser. Your input is not uploaded or stored.
Questions and answers
How do I convert mph to km/h?
Multiply by 1.609344. So 60 mph is about 96.56 km/h.
How fast is a knot?
One knot is 1.852 km/h, or about 1.151 mph.
How do I convert km/h to m/s?
Divide by 3.6. For example, 36 km/h is 10 m/s.
Is this the same as an internet speed converter?
No. This converts physical speed. For data rates like Mbps, use the bandwidth converter.