A knot is a unit of speed that is commonly used in navigation and aviation. One knot is equal to one nautical mile per hour (approximately 1.15078 miles per hour or 1.852 kilometers per hour).

In terms of other units of speed:

- 1 knot ≈ 1.15078 miles per hour (mph)

- 1 knot ≈ 1.852 kilometers per hour (km/h)

- 1 knot ≈ 0.514444 meters per second (m/s)

Knots are often used to measure the speed of ships and aircraft, as well as in meteorology and oceanography.