Correct convention
Road, marine and scientific speeds are normalized to meters per second.
Speed Converter for km/h, mph, Knots and m/s
Convert road, marine and scientific speeds including an approximate Mach reference.
Local conversion with no external APIs or value storage.
Converted value
Conversion table
| Unit | Converted value |
|---|---|
| Centimeter per second (cm/s) | 27.777777778 |
| Meter per second (m/s) | 0.27777777778 |
| Kilometer per hour (km/h) | 1 |
| Kilometer per second (km/s) | 0.000277777778 |
| Mile per hour (mph) | 0.62137119224 |
| Foot per second (ft/s) | 0.91134441528 |
| Knot (kn) | 0.53995680346 |
| Mach at standard reference (Mach) | 0.000809847749 |
The conversion runs locally. Values are not sent to servers, stored by default or processed through external APIs.
How to use this converter
- 1
Enter a valid numeric value.
- 2
Choose the source and destination units.
- 3
Adjust precision, then copy or review equivalents.
Precise, private conversion
Important distinctions
Mach is an approximation based on 343 m/s in dry air at 20 °C at sea level.
Local calculation
Values remain in the browser and are not stored by default.
Frequently asked questions
How is the conversion calculated?
Road, marine and scientific speeds are normalized to meters per second.
What important distinction should I consider?
Mach is an approximation based on 343 m/s in dry air at 20 °C at sea level.
Are conversions exact?
Defined factors are exact where an exact definition exists; display may be rounded to the selected precision.
Are my values sent or stored?
No. Everything is calculated locally without external APIs or default storage.