About the speed converter
Enter a speed to convert it between road, science, and marine units.
How to use this calculator
- Enter a value.
- Choose the units.
- Read the result.
Worked examples
- 60 × 1.609344
96.56 km/h.
Measurement guidance
Pace vs. speed
Runners often use pace (minutes per mile). Use the running pace calculator to convert between pace and speed.
Frequently asked questions
What is a knot?
One nautical mile per hour, about 1.15 mph.
How fast is 100 km/h in mph?
About 62.1 mph.