Speed Converter
Convert speed between km/h, mph, m/s, knots, and ft/s instantly.
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About this tool
Speed limits change units at every border, and sports mix them freely — marathons in km/h, cars in mph, boats in knots. This converter handles the five speed units you will actually meet.
It converts through metres per second internally with exact factors, so 100 km/h is always precisely 62.137 mph.
How to use
- Enter the speed value.
- Select the from and to units.
- Read the converted speed instantly.
Frequently asked questions
Multiply by 0.62 (or divide by 1.6). 100 km/h ≈ 62 mph. The tool gives the exact figure.
One nautical mile per hour (1.852 km/h). It is the standard speed unit in aviation and maritime navigation.
Most of the world uses km/h, while the US and UK use mph — a legacy of imperial measurement systems. This converter handles both.
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