Speed and Velocity Converters
Speed & Velocity Unit Converters
Convert velocity ratings between automotive speedometers, aviation/marine knots, and physical science velocities. Whether reviewing international speed limits or calculating wind velocity, get instant, accurate conversions.
Supported Speed Units
- Road & Transit: Miles per Hour (mph), Kilometers per Hour (km/h)
- Aviation & Nautical: Knots (kn / kt)
- Scientific & Engineering: Meters per Second (m/s), Feet per Second (ft/s)
Popular Speed Conversions
| Conversion Pair | Standard Ratio | Application |
|---|---|---|
| MPH to KPH | 1 mph ≈ 1.60934 km/h | Speed limits when driving abroad in Europe |
| KPH to MPH | 1 km/h ≈ 0.62137 mph | Speedometer compliance in the UK and USA |
| Knots to MPH | 1 kn ≈ 1.15078 mph | Marine sailing, weather wind gust reports |
| Meters/sec to KM/H | 1 m/s = 3.6 km/h | Athletic sprint analysis, ballistics |
Frequently Asked Questions
What is the definition of 1 knot?
One knot is equal to one nautical mile per hour, or exactly 1.852 km/h (approx. 1.15078 mph).
How fast is 100 km/h in miles per hour?
100 km/h is approximately 62.14 mph, a common highway speed benchmark.