Speed Converter
Convert between kilometers per hour, miles per hour, and knots.
Enter a value to see the conversion result
Understanding Speed/Velocity Conversion
Speed measures the rate of motion - how fast an object travels over distance. Kilometers per hour and miles per hour are standard for vehicles, while meters per second is used in physics.
| Unit Type | Unit Name | Value in Meters per Second (m/s) |
|---|---|---|
| Metric | Centimeter/Second (cm/s) | 0.01 m/s |
| Metric | Meter/Second (m/s) | 1 m/s |
| Metric | Kilometer/Hour (km/h) | 0.277778 m/s |
| Imperial | Foot/Second (ft/s) | 0.3048 m/s |
| Imperial | Mile/Hour (mph) | 0.44704 m/s |
| Navigation | Knot (kn) | 0.514444 m/s |
| Physics | Speed of Sound | ~343 m/s |
| Physics | Speed of Light | 299,792,458 m/s |
Conversion Tip
Speed measures distance traveled per unit of time. Kilometers per hour and miles per hour are most common for vehicles.
Quick Reference
- 1 meter/second = 3.6 km/h
- 1 km/h = 0.621 mph
- 1 mph = 1.609 km/h
- 1 knot = 1.852 km/h
- Speed of light = 299,792,458 m/s
- Speed of sound ≈ 343 m/s (at 20°C)
- 1 mach = speed of sound
- 1 foot/second = 0.3048 m/s
Copied!