Convert speed units — km/h, mph, m/s, knots, mach and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 kn | 0.000514444 m/s | |
| 0.01 kn | 0.00514444 m/s | |
| 0.1 kn | 0.0514444 m/s | |
| 1 kn | 0.514444 m/s | |
| 5 kn | 2.57222 m/s | |
| 10 kn | 5.14444 m/s | |
| 50 kn | 25.7222 m/s | |
| 100 kn | 51.4444 m/s | |
| 1000 kn | 514.444 m/s |
Common knot values converted to meter per second — factor: 1 kn = 0.5144 m/s
| Knot (kn) | Meter per Second (m/s) | Context |
|---|---|---|
| 1 kn | 0.5144 m/s | Light air |
| 5 kn | 2.572 m/s | Light breeze |
| 10 kn | 5.144 m/s | Fresh breeze |
| 15 kn | 7.717 m/s | Strong wind |
| 20 kn | 10.29 m/s | Strong wind |
| 30 kn | 15.43 m/s | Gale |
| 50 kn | 25.72 m/s | Storm |
| 80 kn | 41.16 m/s | Violent storm |
| 100 kn | 51.44 m/s | Strong gale |
| 137 kn | 70.48 m/s | Cat 5 hurricane |
| 200 kn | 102.9 m/s | Fast patrol boat |
| 300 kn | 154.3 m/s | Hydrofoil |
| 400 kn | 205.8 m/s | Jet airliner |
| 490 kn | 252.1 m/s | Jet airliner |
| 600 kn | 308.7 m/s | Fast jet |
Converting knot to meter per second is essential for drivers, pilots, engineers, and scientists working across different measurement systems. Road speed limits, aviation airspeed, nautical navigation, and physics calculations each use different speed units, making quick and accurate conversion a practical everyday skill.
Key reference points: 5 kn = 2.572 m/s and 10 kn = 5.144 m/s. At higher speeds, 100 kn = 51.44 m/s. For reverse conversion, multiply m/s values by 1.944 to get back to kn.
All conversions use the internationally recognized factor of exactly 1 kn = 0.5144 m/s. Calculations are performed in IEEE 754 double-precision floating point, giving accuracy to at least 8 significant figures — more than sufficient for any practical application.
Formula: Meter per Second = Knot × 0.514444
Multiply any knot value by 0.514444 to get meter per second. One knot equals 0.514444 m/s.
Reverse: Knot = Meter per Second × 1.9438462
knots × 0.5144 = m/s. Round to × 0.514.
Two knots is approximately one meter per second.
m/s × 1.9438 = knots.
Monitors vessel speed, current, and wind speed in knots for navigation.
Reads airspeed indicators in knots and files flight plans in knots.
Issues speed instructions to aircraft in knots.
Issues gale and storm warnings with wind speeds in knots.
Optimizes sail trim and routing for maximum boat speed in knots.
Reports submerged and surface speeds in knots for tactical planning.
The knot is a unit of speed equal to one nautical mile per hour, approximately 1.852 km/h or 0.514 m/s. Its name comes from the historical practice of measuring ship speed by counting knots on a rope thrown overboard.
Knots are the international standard for maritime and aviation speed. All commercial aircraft, warships, and weather forecasts use knots. Air traffic control worldwide communicates in knots and feet.
Interesting fact: The cruising speed of a Boeing 747 is about 490 knots (907 km/h). Ocean currents are typically 0.5-1 knot, while Category 5 hurricanes sustain winds above 137 knots.
Meters per second is the SI derived unit of speed, defined as one meter of distance traveled per second. It was established when the metric system was codified by France in 1795 and became the scientific standard worldwide.
m/s is the preferred unit in physics, engineering, and scientific research. Wind speeds in meteorology, projectile velocities in ballistics, and fluid flow rates in engineering are all measured in m/s.
Interesting fact: The speed of sound in air at 20°C is approximately 343 m/s. A typical sneeze travels at about 4.5 m/s, while a cheetah can reach 28 m/s (100 km/h).