Converter
Speed Converter — km/h, mph, m/s & knots
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Version 1.0.0 · Last reviewed
How it worksShow guide
Introduction
Convert speeds between metric, imperial, and nautical units using exact SI factors.
Formula
Convert by normalizing to m/s, then scaling to the target unit.
- v — Numeric value
- f — m/s per unit for the selected unit
Step-by-step
- Enter the value.
- Choose the unit you are converting from.
- Choose the unit you want.
- Read the converted result.
Worked example
100 km/h is about 62.14 mph.
Use cases
- Convert car speed limits between km/h and mph
- Translate wind speeds from knots to m/s
- Check treadmill or pace conversions
Frequently asked questions
Are the conversion factors exact?
Yes for the listed units — values use standard SI / customary definitions.
Why might my result look rounded?
Very large or tiny values are shown with limited decimal places for readability.
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