Metric Units
m/s
cm/s
m/min
km/hr
km/s
Imperial & Nautical Units
ft/s
in/s
ft/min
mile/hr
knot
mach
Unit Conversion Relationships
- 1 m/s = 60 m/min = 3.6 km/h = 3.28084 ft/s = 2.23694 mph
- 1 ft/s = 12 in/s = 60 ft/min = 0.3048 m/s = 0.681818 mph
- 1 Knot = 1.852 km/h = 0.514444 m/s = 1.15078 mph
- 1 Mach ≈ 340.29 m/s ≈ 1225 km/h ≈ 761.2 mph (at sea level)
Frequently Asked Questions
What is Mach number and does it vary?
Mach is the ratio of an object's speed to the speed of sound in the surrounding medium. At sea level and standard temperature (15°C / 59°F), Mach 1 is approximately 340.29 m/s (1225 km/h or 761.2 mph). It changes with air temperature and pressure.
How is a knot defined?
A knot is a unit of speed equal to one nautical mile per hour. One nautical mile is historically defined as one minute of latitude along any meridian, which is exactly 1,852 meters. It is widely used in maritime navigation and aviation.
Why are double-precision conversions important here?
Scientific calculations, especially in aerodynamics or physics, require high precision. Our tool uses precise double-precision floating-point conversion anchors to ensure that converting back and forth preserves maximum accuracy.