Speed Converter

Select the units you want to convert between and enter a value.

Speed

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Worth Knowing

Speed conversions come up constantly in travel and weather, and a few anchors help: 100 km/h is about 62 mph, and the knot — one nautical mile per hour, used in aviation and sailing — is roughly 1.15 mph. The knot isn't an arbitrary holdover; it maps cleanly onto latitude and longitude, since a nautical mile equals one minute of arc, which is why ships and aircraft still navigate in knots rather than metric speeds.

How to Use

Choose the unit you're converting from and the unit you want, from the two dropdowns above.
Type a value into the input field — the converted result updates instantly.
Swap the two units any time to flip the direction of the conversion.

Frequently Asked Questions