Convert speed instantly — type a value, pick your units, and every other common unit updates live below. 100% free, runs entirely in your browser, no sign-up.
Every unit below updates live from the value you enter in the "From" field above.
Speed is just distance over time, so every unit here is built from a length unit and a time unit — km/h is kilometers divided by 3.6 to get meters per second, since there are 3.6 thousand-seconds in an hour per kilometer. The knot (one nautical mile per hour) is still the standard for aviation and marine navigation worldwide.
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