Convert speed and velocity between the units used in driving, sailing, flying, and physics. This tool supports meters per second, kilometers per hour, miles per hour, knots, and feet per second. Speed limits, wind reports, boat and aircraft speeds, and lab data all use different conventions, and this converter translates cleanly between them using exact factors (one knot is one nautical mile per hour, and a nautical mile is exactly 1852 meters). Pick your source and target units, type a number, and the result appears live as you type. There is no rounding surprise and no need to memorize conversions. It runs entirely in your browser, so it is instant, private, and available offline after the first load.