Speed Converter
Convert any speed between mph, km/h, m/s, knots, Mach and ft/s — all values appear simultaneously as you type.
What Does This Tool Do?
Convert any speed between metres per second, km/h, mph, knots (nautical miles per hour), Mach and feet per second — all six units shown at once.
Key Features
6 Units
m/s, km/h, mph, knots, ft/s, Mach.
Live
All update instantly as you type.
Mach Included
Mach speed at sea level for aviation use.
Knots
Maritime navigation unit included.
How to Use
- Enter the speed value.
- Select the unit you are converting from.
- All six units update instantly.
Frequently Asked Questions
How many km/h is 1 mph?▾
1 mph = 1.60934 km/h exactly.
What is a knot?▾
1 knot = 1 nautical mile per hour = 1.852 km/h. Used in aviation and maritime navigation.
What is Mach 1?▾
Mach 1 ≈ 340.29 m/s (1234 km/h) at sea level and 15°C. The speed of sound varies with altitude and temperature.