Speed Converter
Convert between km/h, mph, m/s, knots, and feet per second.
Speed limits, weather reports, and vehicle specifications use different units depending on the country and context — kilometers per hour in most of the world, miles per hour in the US and UK, knots in aviation and marine contexts, and meters per second in scientific contexts. Converting between them accurately matters for anything from planning an international road trip to understanding wind speed in a forecast from a different region.
This converter handles all the common speed units with exact conversion factors, updating instantly as you enter a value or change units — useful for travelers, pilots, sailors, and anyone working with speed data across regional unit conventions.
How to use Speed Converter
- 1
Enter your value
Type the speed you want to convert.
- 2
Select the source unit
Choose the unit your value is currently in.
- 3
Select the target unit
Choose the unit you want to convert to.
- 4
Read the result
The converted value updates instantly.
Features
- Covers km/h, mph, m/s, knots, and ft/s
- Exact conversion factors for aviation, marine, and everyday use
- Instant live conversion
Frequently asked questions
Common mistakes to avoid
- Using a rounded mental conversion (like km/h × 0.6 for mph) for situations needing precision, such as speed limit compliance.
- Confusing knots with mph — they differ by about 15%.
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