Velocity
mm/stoft/s
Convert millimetres per second (mm/s) to feet per second (ft/s).
Factor1 mm/s = 0.00328084 ft/s
Converter
mm/s
Accepts numbers or expressions, e.g. 150 + 14.7
Result
ft/s
Rendered to 6 significant figures.
Formula
Formula
ft/s = mm/s × 0.00328084
Multiply any value in millimetres per second by 0.00328084 to obtain the value in feet per second.
Worked example
Convert 1000 mm/s to ft/s.
- 01Start with 1000 mm/s.
- 02Multiply by the conversion factor: 1000 × 0.00328084 = 3.28084 ft/s.
Result1000 mm/s = 3.28084 ft/s
Conversion table
| mm/s | ft/s |
|---|---|
| 1 | 0.0032808 |
| 2 | 0.0065617 |
| 5 | 0.016404 |
| 10 | 0.032808 |
| 20 | 0.065617 |
| 50 | 0.16404 |
| 100 | 0.32808 |
| 200 | 0.65617 |
| 500 | 1.6404 |
| 1000 | 3.2808 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mm/s to ft/s?
1 mm/s equals 0.00328084 ft/s. To convert, multiply the value in millimetres per second by 0.00328084.
How do I convert 1 mm/s to ft/s?
1 mm/s = 0.00328084 ft/s. For any value, multiply by 0.00328084.
How do I convert ft/s back to mm/s?
Divide by the same factor — or equivalently, multiply by 304.8. So 1 ft/s = 304.8 mm/s.
When would I need to convert millimetre per second to foot per second?
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).