The Speed Converter changes any velocity between metric, imperial and nautical units. Enter a speed, choose the units, and see the exact equivalent plus a table covering km/h, mph, m/s, knots and more.
Convert any speed unit
This converter handles meters per second, kilometers per hour, miles per hour, feet per second, knots and even Mach (relative to the speed of sound at sea level). It is ideal for driving, running, aviation, sailing and physics problems.
Conversions are exact (1 mph = 0.44704 m/s, 1 knot = 1 nautical mile per hour), and swapping units recalculates everything instantly.
Popular speed conversions
- km/h to mph and mph to km/h
- m/s to km/h for physics
- Knots to mph for sailing and aviation
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