Convert speed units — km/h, mph, m/s, knots, Mach.
| Unit | Name | Value |
|---|---|---|
| km/h | Kilometer per Hour | 3.5999971 |
| mph | Mile per Hour | 2.2369363 |
| ft/s | Foot per Second | 3.2808399 |
| kn | Knot | 1.9438462 |
| Mach | Mach | 0.00293867 |
Common meter per second values converted to mach — factor: 1 m/s = 0.002939 mach
| Meter per Second (m/s) | Mach (mach) | Context |
|---|---|---|
| 0.5 m/s | 0.001469 mach | Snail |
| 1 m/s | 0.002939 mach | Walk |
| 2 m/s | 0.005877 mach | Walk |
| 5 m/s | 0.01469 mach | Fast jog |
| 10 m/s | 0.02939 mach | Fast sprint |
| 15 m/s | 0.04408 mach | Fast sprint |
| 20 m/s | 0.05877 mach | Cheetah |
| 28 m/s | 0.08228 mach | Cheetah |
| 50 m/s | 0.1469 mach | Racing car |
| 100 m/s | 0.2939 mach | Fast aircraft |
| 200 m/s | 0.5877 mach | Subsonic jet |
| 343 m/s | 1.008 mach | Speed of sound |
| 500 m/s | 1.469 mach | Fast jet |
| 1,000 m/s | 2.939 mach | Hypersonic |
| 8,000 m/s | 23.51 mach | Orbital speed |
Converting meter per second to mach 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 m/s = 0.01469 mach and 10 m/s = 0.02939 mach. At higher speeds, 100 m/s = 0.2939 mach. For reverse conversion, multiply mach values by 340.3 to get back to m/s.
All conversions use the internationally recognized factor of exactly 1 m/s = 0.002939 mach. 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: Mach = Meter per Second × 0.0029385836
Multiply any meter per second value by 0.0029385836 to get mach. One meter per second equals 0.0029385836 mach.
Reverse: Meter per Second = Mach × 340.3
m/s ÷ 343 = Mach number at sea level 20°C.
Speed of sound at sea level = 343 m/s = Mach 1.
Mach × 343 = m/s.
Uses m/s as the SI unit for velocity in equations, experiments, and papers.
Calculates airflow, water flow, and pipe velocities in m/s.
Measures muzzle velocities and projectile speeds in m/s.
Analyzes turbine cut-in, rated, and cut-out wind speeds in m/s.
Measures sprinter acceleration and peak velocity in m/s for training.
Programs robot motion and joint velocity limits in meters per second.
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).
Mach number was named after Austrian physicist Ernst Mach (1838-1916), who studied the properties of supersonic flow. It represents the ratio of an object's speed to the local speed of sound.
Mach is used in aviation and aerospace to describe speeds relative to sound: Mach 1 is the sound barrier (~340 m/s at sea level), Mach 2 is twice that. Commercial aircraft cruise at Mach 0.85, while fighter jets reach Mach 2+.
Interesting fact: The SR-71 Blackbird held the air speed record at Mach 3.3 (3,530 km/h). The Space Shuttle re-entered the atmosphere at Mach 25, and the Parker Solar Probe reached Mach 163.