Speed Converter
Convert speed between meters/second, km/h, mph, knots, and feet/second.
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Frequently asked questions
Why is a knot different from mph?+
A knot is one nautical mile per hour, and a nautical mile (about 1.15 statute miles) is based on a minute of latitude, not the mile used on land. That's why 1 knot works out to roughly 1.15 mph.
What's this useful for beyond weather and sailing?+
Converting spec sheets between regions is the most common case: a car's top speed listed in km/h, a wind rating in mph, a drone's speed limit in m/s.
Are the results rounded?+
Displayed to 6 significant decimal places, then trimmed, so you get a precise value without long trailing zeros.