Convert Knots to feet per second
1 knot = 1.6878 feet per second · ft/s = kn × 1.687809857
When you need this conversion
This conversion goes from knots, the navigation speed unit for aviation and sailing, to feet per second, used in ballistics and US engineering. Both measure the same physical quantity, so the conversion is exact — the difference is which unit your source, tool, or region happens to use.
Knots to feet per second conversion table
| Knots (kn) | Feet per second (ft/s) |
|---|---|
| 1 kn | 1.6878 ft/s |
| 2 kn | 3.3756 ft/s |
| 3 kn | 5.0634 ft/s |
| 5 kn | 8.439 ft/s |
| 10 kn | 16.8781 ft/s |
| 15 kn | 25.3171 ft/s |
| 20 kn | 33.7562 ft/s |
| 25 kn | 42.1952 ft/s |
| 50 kn | 84.3905 ft/s |
| 75 kn | 126.59 ft/s |
| 100 kn | 168.78 ft/s |
| 250 kn | 421.95 ft/s |
| 500 kn | 843.9 ft/s |
| 1,000 kn | 1,687.81 ft/s |
The formula
ft/s = kn × 1.687809857Because both units measure speed, the conversion is a single multiplication by a fixed factor. That factor never changes, so the result is exact.
Convert the other way
Feet per second to knots →Related speed conversions
- Knots to kilometers per hour
- Kilometers per hour to miles per hour
- Kilometers per hour to knots
- Miles per hour to kilometers per hour
- Meters per second to feet per second
- Kilometers per hour to feet per second
- Miles per hour to feet per second
- Knots to meters per second
- Knots to miles per hour
- Knots to mach
- Mach to feet per second
- Meters per second to kilometers per hour
Frequently asked questions
- How many feet per second are in a knot?
- There are 1.6878 feet per second in 1 knot. The formula is ft/s = kn × 1.687809857.
- How do you convert knots to feet per second?
- Use the formula ft/s = kn × 1.687809857. For example, 10 knots equals 16.8781 feet per second.
- Is the knots to feet per second conversion exact?
- Yes. Knots and feet per second are both units of speed, related by an exact defined factor. Displayed results are rounded for readability.
- What is kn short for?
- kn is the standard symbol for knot. ft/s is the symbol for foot per second.