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Speed Converter

Convert between m/s, km/h, mph, ft/s, knots, and Mach.

m/s (meters/second)
27.777778
km/s (kilometers/second)
0.027777778
km/h (kilometers/hour)
100
mph (miles/hour)
62.137119
ft/s (feet/second)
91.134442
Knot (nautical mi/h)
53.995727
Mach (speed of sound)
0.080984775
Speed of light (c)
9.265669e-8

Reference

  • 1 km/h = 0.27778 m/s = 0.62137 mph
  • 1 mph = 1.60934 km/h = 0.44704 m/s
  • 1 knot = 1.852 km/h = 1.15078 mph
  • Mach 1 β‰ˆ 343 m/s (at sea level, 20Β°C)
  • Speed of light = 299,792,458 m/s