Speed Converter

This free speed converter converts speed between kilometres per hour (km/h), miles per hour (mph), metres per second (m/s), feet per second (ft/s), knots, Mach and more. Handy for travel, sport, aviation, marine navigation and physics.

Pick any pair of units, or tap a quick preset like km/h → mph. Choose how many decimals you want (or leave it on Auto for sensible significant figures), copy the result with one click, and use the live table to see your value expressed in every supported unit at once. Common factors: multiply m/s by 3.6 for km/h, multiply mph by 1.60934 for km/h, and multiply knots by 1.15078 for mph.