Speed Converter
Convert between km/h, mph, metres per second and knots.
Processing: This tool runs entirely in your browser. Your input and any file you open stay on your device — nothing is uploaded to a server.
How to use the speed converter
- Type the amount you want to convert.
- Choose the unit you have and the unit you want.
- Read the result, or use the table showing all 5 units at once.
About this tool
Speed conversions come up whenever a limit, a forecast or a specification crosses a border. 100 km/h is about 62 mph; 60 mph is about 97 km/h.
Metres per second is the SI unit and the one physics uses, while knots — one nautical mile per hour — remain standard in aviation and at sea, which is why wind speeds are often quoted in them.
Common uses
- Reading a foreign speed limit.
- Converting a wind speed from knots.
- Checking a running or cycling pace in other units.
Frequently asked questions
- What is 100 km/h in mph?
- About 62.14 mph. Going the other way, 60 mph is about 96.6 km/h.
- Why are knots used for wind and boats?
- A knot is one nautical mile per hour, and a nautical mile is one minute of latitude — which makes navigation arithmetic straightforward on a chart.
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