Speed Converter Units
Convert km/h, mph, knots, meters per second and Mach.
Speed Converter is a free online tool that convert km/h, mph, knots, meters per second and Mach. It runs entirely in your web browser using plain JavaScript, so files are processed on your own device and never uploaded to a server. There is no sign-up, no file size limit imposed by the site, no watermark and no paid tier.
- Price
- Free — no account, no quota, no watermark
- Category
- Units
- Where it runs
- In your browser, on your device
- Files uploaded
- None
- Technology
- plain JavaScript
- Settings
- 3
- Works offline
- Yes, after the first visit
About Speed Converter
Speed Converter is one of 19 units tools on DuckyTools, and like all of them it runs entirely inside this page. Convert km/h, mph, knots, meters per second and Mach.
How to use it
- Enter value, from and to.
- Results update the moment anything changes.
The 3 settings
| Setting | What it does | Default |
|---|---|---|
| Value | A numeric value. | 100 |
| From | Choose from 6: Meters per second, Kilometers per hour, Miles per hour, Feet per second, Knots, Mach (at sea level). | Kilometers per hour |
| To | Choose from 6: Meters per second, Kilometers per hour, Miles per hour, Feet per second, Knots, Mach (at sea level). | Miles per hour |
Conversion reference
Exact factors used by this converter, expressed against meters per second (m/s). These are the defined values, not rounded approximations.
| Unit | Symbol | In m/s |
|---|---|---|
| Meters per second | m/s | 1 |
| Kilometers per hour | km/h | 0.277777778 |
| Miles per hour | mph | 0.44704 |
| Feet per second | ft/s | 0.3048 |
| Knots | kn | 0.514444444 |
| Mach (at sea level) | Ma | 340.29 |
Under the hood
| Runs on | plain JavaScript — runs the whole thing |
| Controls | Value, From, To |
Questions
What does the from option change?
It offers 6 choices — Meters per second, Kilometers per hour, Miles per hour and Feet per second and more. The default is Kilometers per hour, which suits most cases; change it when your input or your destination calls for something specific.