Speed Converter

Convert speed between various units. Perfect for travel, athletics, engineering, and understanding vehicle speeds.

From
Enter speed value
To
Converted value
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About Speed Conversion

Speed is the rate at which an object covers distance. It is measured as distance divided by time.

Common Speed Units

Metric System

  • Meters per Second (m/s) - The SI unit of speed
  • Kilometers per Hour (km/h) - Commonly used for vehicles and travel

Imperial System

  • Miles per Hour (mph) - Common in the US and UK for vehicles
  • Feet per Second (ft/s) - Used in engineering and ballistics

Nautical & Aviation

  • Knots (kn) - One nautical mile per hour, used in maritime and aviation
  • Mach - Speed relative to the speed of sound (~343 m/s at sea level)

Quick Reference

  • 1 m/s = 3.6 km/h = 2.237 mph
  • 1 km/h = 0.621 mph
  • 1 mph = 1.609 km/h
  • 1 knot = 1.852 km/h
  • Speed of sound (Mach 1) ≈ 343 m/s ≈ 1,235 km/h

Speed Examples

  • Walking: ~5 km/h (3.1 mph)
  • Running: ~15 km/h (9.3 mph)
  • City Driving: ~50 km/h (31 mph)
  • Highway Driving: ~100 km/h (62 mph)
  • Commercial Airplane: ~900 km/h (560 mph)
  • Speed of Sound: 1,235 km/h (767 mph)

Common Uses

  • Transportation - km/h or mph
  • Aviation & Maritime - Knots, Mach
  • Athletics - m/s or km/h
  • Physics & Engineering - m/s