Velocity
kntoft/s
Convert knots (kn) to feet per second (ft/s).
Factor1 kn = 1.68781 ft/s
Converter
kn
Accepts numbers or expressions, e.g. 150 + 14.7
Result
ft/s
Rendered to 6 significant figures.
Formula
Formula
ft/s = kn × 1.68781
Multiply any value in knots by 1.68781 to obtain the value in feet per second.
Worked example
Convert 50 kn to ft/s.
- 01Start with 50 kn.
- 02Multiply by the conversion factor: 50 × 1.68781 = 84.3905 ft/s.
Result50 kn = 84.3905 ft/s
Conversion table
| kn | ft/s |
|---|---|
| 1 | 1.6878 |
| 2 | 3.3756 |
| 5 | 8.439 |
| 10 | 16.878 |
| 20 | 33.756 |
| 50 | 84.39 |
| 100 | 168.78 |
| 200 | 337.56 |
| 500 | 843.9 |
| 1000 | 1687.8 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from kn to ft/s?
1 kn equals 1.68781 ft/s. To convert, multiply the value in knots by 1.68781.
How do I convert 1 kn to ft/s?
1 kn = 1.68781 ft/s. For any value, multiply by 1.68781.
How do I convert ft/s back to kn?
Divide by the same factor — or equivalently, multiply by 0.5924838. So 1 ft/s = 0.592484 kn.
When would I need to convert knot 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?
Yes. Both kn and ft/s are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).