Speed Converter
Convert between mph, km/h, m/s, and knots. Enter value and unit. 1 mph = 1.609344 km/h; 1 knot = 1.852 km/h.
Convert speed
Enter value and click Convert.
How it works
We convert via m/s: 1 km/h = 0.277778 m/s, 1 mph = 0.44704 m/s, 1 knot = 0.514444 m/s.
When to use it
Use for driving, aviation, or physics.
Frequently asked questions
- What is a knot? Nautical mile per hour; 1 knot = 1.852 km/h.