Converters
Speed Converter
Convert between km/h, mph, m/s, knots, and ft/s instantly.
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Version 1.0.0 · Last reviewed
Tool
Result
Live output from your inputs
Enter values and calculate to see results.
How it worksShow guideHide 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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