Convert knots to feet per second
1 kn = 1.68781 ft/s. Change the amount below, or read the formula and the reference table further down.
1 knot equals
feet per second
1 kn = 1.68781 ft/s
The formula
Knots and feet per second both measure speed from the same zero, so a single multiplier does the job.
ft/s = kn × 1.68780986
Going the other way? Convert feet per second to knots.
Knots to feet per second table
Common values, rounded for reading.
| Knots (kn) | Feet per second (ft/s) |
|---|---|
| 1 | 1.6878 |
| 2 | 3.3756 |
| 3 | 5.0634 |
| 4 | 6.7512 |
| 5 | 8.439 |
| 6 | 10.1269 |
| 7 | 11.8147 |
| 8 | 13.5025 |
| 9 | 15.1903 |
| 10 | 16.8781 |
| 15 | 25.3171 |
| 20 | 33.7562 |
| 25 | 42.1952 |
| 30 | 50.6343 |
| 40 | 67.5124 |
| 50 | 84.3905 |
| 75 | 126.59 |
| 100 | 168.78 |
| 250 | 421.95 |
| 500 | 843.9 |
| 1,000 | 1,687.81 |
Questions people ask
- How many feet per second are in a knot?
- One knot equals 1.68780986 feet per second.
- How do I convert knots to feet per second by hand?
- Multiply the number of knots by 1.68780986. For a rough check, 1.7 is close enough for most everyday use.
- What is 1 knot in feet per second?
- 1 knot is 1.68781 feet per second.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.