Convert between all common units of speed and velocity, including knots for marine and aviation use and mach for high-speed contexts.
Getting started
Enter a speed and select its current unit.
Choose the target unit for an instant conversion.
Swap the direction whenever it is more convenient.
Why it helps
Includes knots, which matter for sailing, flying and weather forecasts.
Metres per second supports physics and engineering work directly.
Precise factors avoid the rounding errors of mental approximations.
In practice
Reading a speed limit abroad in units you think in.
Converting wind speed between forecast formats.
Working with velocity figures in physics coursework.
Everything people ask most about the speed converter, answered plainly.
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