Velocity
kntomm/s
Convert knots (kn) to millimetres per second (mm/s).
Factor1 kn = 514.4444 mm/s
Converter
kn
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mm/s
Rendered to 6 significant figures.
Formula
Formula
mm/s = kn × 514.4444
Multiply any value in knots by 514.4444 to obtain the value in millimetres per second.
Worked example
Convert 1 kn to mm/s.
- 01Start with 1 kn.
- 02Multiply by the conversion factor: 1 × 514.4444 = 514.444 mm/s.
Result1 kn = 514.444 mm/s
Conversion table
| kn | mm/s |
|---|---|
| 1 | 514.44 |
| 2 | 1028.9 |
| 5 | 2572.2 |
| 10 | 5144.4 |
| 20 | 10289 |
| 50 | 25722 |
| 100 | 51444 |
| 200 | 1.0289e+5 |
| 500 | 2.5722e+5 |
| 1000 | 5.1444e+5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from kn to mm/s?
1 kn equals 514.4444 mm/s. To convert, multiply the value in knots by 514.4444.
How do I convert 1 kn to mm/s?
1 kn = 514.444 mm/s. For any value, multiply by 514.4444.
How do I convert mm/s back to kn?
Divide by the same factor — or equivalently, multiply by 0.001943844. So 1 mm/s = 0.00194384 kn.
When would I need to convert knot to millimetre 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).