The knot conversion selector here selects the speed/velocity measurement unit to convert to starting from knots (kn). To make a conversion starting from a unit of speed other than knot, simply click on the "Reset" button.
The knot is a non-SI unit of speed equal to one international nautical mile per hour or approximately 0.514444 meters per second (1 kn = 0.514444 m/s), the derived unit of speed in the International System of Units (SI).
One knot (kn) is also equal to about 1.852 kilometers per hour (km/h), or 1.150779 miles per hour (mph) or 1.68781 feet per second (ft/s).
The knot is used worldwide in nautical and air navigation and in meteorology.