Convert between different speed units like km/h, mph, m/s, and others quickly and easily.
Speed is a physical quantity that measures the distance traveled by an object in a given period of time. It is commonly expressed in units such as kilometers per hour (km/h), meters per second (m/s), and miles per hour (mph). In physics, speed is a scalar quantity, meaning it only has magnitude and no direction.
| Unit | Equivalence |
|---|---|
| 1 km/h | 0.621371 mph |
| 1 mph | 1.60934 km/h |
| 1 m/s | 3.6 km/h |
| 1 knot | 1.852 km/h |
Did you know that the land speed record was achieved by a vehicle called Thrust SSC, which reached 1,227.985 km/h in 1997? In the animal kingdom, the cheetah is the fastest land animal, reaching speeds of up to 120 km/h over short distances. Meanwhile, the International Space Station travels at an astonishing 28,000 km/h while orbiting Earth!