Speed Converter
This free online speed conversion tool allows you to quickly and accurately convert a speed measurement into a range of commonly used metric, imperial, and nautical units. Whether you’re comparing vehicle speeds, analysing motion in physics, working with aviation or maritime data, or converting international speed limits, this calculator provides fast and reliable results.
With this speed calculator, you can convert between Metres per Second, Kilometres per Hour, Feet per Second, Miles per Hour, and Knots. Simply enter a value into any of the available input fields, and the calculator will instantly convert and display the equivalent speeds across all other supported units, removing the need for manual calculations.
Enter Speed Value
How to Use?
The speed conversion calculator is a handy webtool to use to convert from one speed to another.
- Enter a speed value into one of the fields above.
- All the other fields will automatically update to their converted speed.
- You can copy any speed value to the clipboard, by clicking on the symbol.
- Any number value will be accepted including the 'e' exponent.
- If you would like to see another speed added to the above, please contact us.
Speed Unit Comparison Table
| Unit Name | Symbol | Description | Equals in Metres per Second |
|---|---|---|---|
| Metre per Second | m/s | Base SI unit of speed | 1 m/s |
| Kilometres per Hour | km/h | Common unit for road speeds | 0.277778 m/s |
| Feet per Second | ft/s | Imperial unit often used in engineering | 0.3048 m/s |
| Miles per Hour | mph | Commonly used for road speeds in the US and UK | 0.44704 m/s |
| Knots | kn | Nautical speed based on one nautical mile per hour | 0.514444 m/s |
Helpful Notes
- km/h is widely used for road speed limits around the world.
- mph is primarily used in the United States and the United Kingdom.
- knots are standard in aviation and maritime navigation.
- m/s is commonly used in scientific and physics calculations.
- ft/s appears frequently in engineering and technical contexts.