Speed measures how quickly an object moves from one place to another—the rate of change of position over time. Whether you're checking your car's speedometer, tracking a hurricane, or calculating satellite orbits, accurate speed conversion is essential. Our converter handles everything from everyday units like km/h and mph to specialized units like knots and Mach numbers.
Speed measurement evolved alongside human transportation. Ancient civilizations estimated travel times in days. The introduction of speedometers in the late 19th century made precise speed measurement practical. The standardization of units came with the metric system (m/s, km/h) and the continued use of imperial units (mph) in some countries. Aviation introduced knots for navigation, while supersonic flight brought Mach numbers into common use.
Multiply kilometers per hour by 0.621371 to get miles per hour.
Example: 100 km/h × 0.621371 = 62.14 mph
Multiply miles per hour by 1.60934 to get kilometers per hour.
Example: 65 mph × 1.60934 = 104.6 km/h
Multiply meters per second by 3.6 to get kilometers per hour.
Example: 25 m/s × 3.6 = 90 km/h
Multiply knots by 1.852 to get kilometers per hour.
Example: 30 knots × 1.852 = 55.56 km/h
A typical highway speed limit of 120 km/h in metric countries.
The fastest recorded human running speed, achieved by Usain Bolt.
A typical cruising speed for a commercial jet airliner.
The speed of sound at sea level (Mach 1) varies with temperature.
Earth travels around the Sun at approximately 107,000 km/h.
Average human walking speed is about 5 km/h or 3.1 mph.
| 1 m/s = 6000 cm/min | 1 meters-second equals 6000 centimeters-minute | 1 * 6000 = X cm/min |
| 1 m/s = 100 cm/s | 1 meters-second equals 100 centimeters-second | 1 * 100 = X cm/s |
| 1 m/s = 11811 ft/h | 1 meters-second equals 11811 feet-hour | 1 * 11811 = X ft/h |
| 1 m/s = 196.85039370078738 ft/min | 1 meters-second equals 196.85039370078738 feet-minute | 1 * 196.85039370078738 = X ft/min |
| 1 m/s = 3.280839895013123 ft/s | 1 meters-second equals 3.280839895013123 feet-second | 1 * 3.280839895013123 = X ft/s |
| 1 m/s = 2362.2 in/min | 1 meters-second equals 2362.2 inches-minute | 1 * 2362.2 = X in/min |
| 1 m/s = 39.37007874015748 in/s | 1 meters-second equals 39.37007874015748 inches-second | 1 * 39.37007874015748 = X in/s |
| 1 m/s = 3.5999999999999996 km/h | 1 meters-second equals 3.5999999999999996 kilometers-hour | 1 * 3.5999999999999996 = X km/h |
| 1 m/s = 0.001 km/s | 1 meters-second equals 0.001 kilometers-second | 1 * 0.001 = X km/s |
| 1 m/s = 1.943844492440605 kn | 1 meters-second equals 1.943844492440605 knots | 1 * 1.943844492440605 = X kn |
| 1 m/s = 0.002938641460175678 M | 1 meters-second equals 0.002938641460175678 Mach number (ISA-Sea level) | 1 * 0.002938641460175678 = X M |
| 1 m/s = 3600 m/h | 1 meters-second equals 3600 meters-hour | 1 * 3600 = X m/h |
| 1 m/s = 60 m/min | 1 meters-second equals 60 meters-minute | 1 * 60 = X m/min |
| 1 m/s = 2.2369362920544025 mph | 1 meters-second equals 2.2369362920544025 miles-hour | 1 * 2.2369362920544025 = X mph |
| 1 m/s = 0.03728227153424004 mi/min | 1 meters-second equals 0.03728227153424004 miles-minute | 1 * 0.03728227153424004 = X mi/min |
| 1 m/s = 0.0006213711922373339 mi/s | 1 meters-second equals 0.0006213711922373339 miles-second | 1 * 0.0006213711922373339 = X mi/s |
| 1 m/s = 1.943844492440605 nmi/h | 1 meters-second equals 1.943844492440605 nautical miles-hour | 1 * 1.943844492440605 = X nmi/h |
| 1 m/s = 46.652267818574515 nm/day | 1 meters-second equals 46.652267818574515 Nm-24hr | 1 * 46.652267818574515 = X nm/day |
| 1 m/s = 3.335668301144134e-9 m/s | 1 meters-second equals 3.335668301144134e-9 speed of light | 1 * 3.335668301144134e-9 = X m/s |
| 1 m/s = 0.0029154518950437317 m/s | 1 meters-second equals 0.0029154518950437317 speed of sound | 1 * 0.0029154518950437317 = X m/s |
| 1 m/s = 3937.0000000000005 yd/h | 1 meters-second equals 3937.0000000000005 yards-hour | 1 * 3937.0000000000005 = X yd/h |
| 1 m/s = 65.61679790026247 yd/min | 1 meters-second equals 65.61679790026247 yards-minute | 1 * 65.61679790026247 = X yd/min |
| 1 m/s = 1.0936132983377078 yd/s | 1 meters-second equals 1.0936132983377078 yards-second | 1 * 1.0936132983377078 = X yd/s |