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 foot per second — factor: 1 m/s = 3.281 ft/s
| Meter per Second (m/s) | Foot per Second (ft/s) | Context |
|---|---|---|
| 0.5 m/s | 1.64 ft/s | Snail |
| 1 m/s | 3.281 ft/s | Walk |
| 2 m/s | 6.562 ft/s | Walk |
| 5 m/s | 16.4 ft/s | Fast jog |
| 10 m/s | 32.81 ft/s | Fast sprint |
| 15 m/s | 49.21 ft/s | Fast sprint |
| 20 m/s | 65.62 ft/s | Cheetah |
| 28 m/s | 91.86 ft/s | Cheetah |
| 50 m/s | 164 ft/s | Racing car |
| 100 m/s | 328.1 ft/s | Fast aircraft |
| 200 m/s | 656.2 ft/s | Subsonic jet |
| 343 m/s | 1,125 ft/s | Speed of sound |
| 500 m/s | 1,640 ft/s | Fast jet |
| 1,000 m/s | 3,281 ft/s | Hypersonic |
| 8,000 m/s | 2.625e+04 ft/s | Orbital speed |
Converting meter per second to foot 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 m/s = 16.4 ft/s and 10 m/s = 32.81 ft/s. At higher speeds, 100 m/s = 328.1 ft/s. For reverse conversion, multiply ft/s values by 0.3048 to get back to m/s.
All conversions use the internationally recognized factor of exactly 1 m/s = 3.281 ft/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: Foot per Second = Meter per Second × 3.2808399
Multiply any meter per second value by 3.2808399 to get foot per second. One meter per second equals 3.2808399 ft/s.
Reverse: Meter per Second = Foot per Second × 0.3048
1 m/s = 3.2808399 ft/s. Memorize this for instant mental estimates.
Use 3.2808 as a quick mental multiplier.
To verify: multiply your result by 0.3048 to recover the original m/s value.
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).
Feet per second is an Imperial unit of speed equal to exactly 0.3048 m/s. It was in common use in Britain and America from the 17th century, particularly in ballistics and military applications.
ft/s remains the standard in US ballistics: bullet velocities, muzzle speeds, and arrow velocities are universally quoted in feet per second. It also appears in HVAC airflow measurements and some engineering contexts.
Interesting fact: A typical rifle bullet travels at 900-1,200 ft/s (270-370 m/s). The speed of sound at sea level is approximately 1,125 ft/s.