Speed Converter
Convert between km/h, mph, m/s and knots.
Enter values
—
—
Step by step
The formula
result = value × (factorₓ / factorᵧ)
Speed is distance over time, so every conversion is really two conversions at once. A knot is one nautical mile per hour — and since a nautical mile is a minute of latitude, it stays useful for navigation in a way land units do not.
All calculations run locally in your browser and update instantly as you type.
Example calculations
Common questions this calculator answers — select one to load its values.
Related calculators
Frequently asked questions
How fast is one knot?+
One knot equals 1.852 km/h or about 1.151 mph.
All calculations run locally in your browser. Nothing you type is sent to a server.