Speed converter
Convert metres per second, kilometres per hour, miles per hour, knots, and feet per second.
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The speed converter translates common road, marine, aviation, and scientific speed units through metres per second.
When to use this tool
- Compare kilometres per hour with miles per hour for driving.
- Convert a marine speed in knots to metres per second.
How to use
- Enter a finite speed.
- Select its current unit and the desired unit.
- Review the converted result.
Example
Kilometres per hour to miles per hour
Entering 100 km/h returns approximately 62.137119224 mph.
How it works
- A speed is a distance divided by time. Fixed factors express every option in metres per second before conversion.
Limits and notes
- The tool converts scalar speed only and does not include direction, acceleration, wind, or current.
- Displayed rounding may be unsuitable for navigation or safety-critical calculations.
Frequently asked questions
What is a knot?
One knot is one nautical mile per hour and is represented here as 0.5144444444 metre per second.
Does mph mean miles per hour?
Yes. The option uses the international mile and a 3,600-second hour.
References
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