Velocity
mm/stokm/h
Convert millimetres per second (mm/s) to kilometres per hour (km/h).
Factor1 mm/s = 0.0036 km/h
Converter
mm/s
Accepts numbers or expressions, e.g. 150 + 14.7
Result
km/h
Rendered to 6 significant figures.
Formula
Formula
km/h = mm/s × 0.0036
Multiply any value in millimetres per second by 0.0036 to obtain the value in kilometres per hour.
Worked example
Convert 1000 mm/s to km/h.
- 01Start with 1000 mm/s.
- 02Multiply by the conversion factor: 1000 × 0.0036 = 3.6 km/h.
Result1000 mm/s = 3.6 km/h
Conversion table
| mm/s | km/h |
|---|---|
| 1 | 0.0036 |
| 2 | 0.0072 |
| 5 | 0.018 |
| 10 | 0.036 |
| 20 | 0.072 |
| 50 | 0.18 |
| 100 | 0.36 |
| 200 | 0.72 |
| 500 | 1.8 |
| 1000 | 3.6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mm/s to km/h?
1 mm/s equals 0.0036 km/h. To convert, multiply the value in millimetres per second by 0.0036.
How do I convert 1 mm/s to km/h?
1 mm/s = 0.0036 km/h. For any value, multiply by 0.0036.
How do I convert km/h back to mm/s?
Divide by the same factor — or equivalently, multiply by 277.7778. So 1 km/h = 277.778 mm/s.
When would I need to convert millimetre per second to kilometre per hour?
Velocity conversions are needed for fluid flow analysis (line velocity targets, erosional limits), gas-stream calculations, and equipment specs that mix m/s, ft/s and engineering speed units.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).