Knots to Feet per Second (kn to ft/s) Converter
1 knot (kn) = 1.68781 feet per second (ft/s). To convert knots to feet per second, multiply by 1.68781: 20 kn × 1.68781 = 33.7562 ft/s.
Quick facts
- 1 kn = 1.68781 ft/s
- 1 ft/s = 0.592484 kn
- Formula: ft/s = kn × 1.68781
- Quick estimate: multiply by about 1.7
How to convert knots to feet per second
- Take the value in knots.
- Multiply it by 1.68781 (the number of feet per second in one knot).
- Round the result to the precision you need.
Worked example (a ferry's cruising speed): 20 kn × 1.68781 = 33.7562 ft/s.
To convert feet per second back to knots, multiply by 0.592484, or divide by 1.68781.
Source: NIST SP 811 (2008), derived from the metre, the international mile and the second.
Knots to Feet per Second conversion table
| Knots [kn] | Feet per Second [ft/s] |
|---|---|
| 0.01 kn | 0.0168780986 ft/s |
| 0.1 kn | 0.1687809857 ft/s |
| 1 kn | 1.687809857 ft/s |
| 2 kn | 3.3756197139 ft/s |
| 3 kn | 5.0634295709 ft/s |
| 5 kn | 8.4390492848 ft/s |
| 10 kn | 16.8780985696 ft/s |
| 20 kn | 33.7561971391 ft/s |
| 50 kn | 84.3904928478 ft/s |
| 100 kn | 168.7809856955 ft/s |
| 1000 kn | 1687.8098569554 ft/s |
kn to ft/s chart from 1 to 100
- 1 kn 1.68781 ft/s
- 2 kn 3.37562 ft/s
- 3 kn 5.06343 ft/s
- 4 kn 6.75124 ft/s
- 5 kn 8.43905 ft/s
- 6 kn 10.1269 ft/s
- 7 kn 11.8147 ft/s
- 8 kn 13.5025 ft/s
- 9 kn 15.1903 ft/s
- 10 kn 16.8781 ft/s
- 11 kn 18.5659 ft/s
- 12 kn 20.2537 ft/s
- 13 kn 21.9415 ft/s
- 14 kn 23.6293 ft/s
- 15 kn 25.3171 ft/s
- 16 kn 27.005 ft/s
- 17 kn 28.6928 ft/s
- 18 kn 30.3806 ft/s
- 19 kn 32.0684 ft/s
- 20 kn 33.7562 ft/s
- 25 kn 42.1952 ft/s
- 30 kn 50.6343 ft/s
- 35 kn 59.0733 ft/s
- 40 kn 67.5124 ft/s
- 45 kn 75.9514 ft/s
- 50 kn 84.3905 ft/s
- 55 kn 92.8295 ft/s
- 60 kn 101.269 ft/s
- 65 kn 109.708 ft/s
- 70 kn 118.147 ft/s
- 75 kn 126.586 ft/s
- 80 kn 135.025 ft/s
- 85 kn 143.464 ft/s
- 90 kn 151.903 ft/s
- 95 kn 160.342 ft/s
- 100 kn 168.781 ft/s
Feet per Second to Knots conversion table
| Feet per Second [ft/s] | Knots [kn] |
|---|---|
| 0.01 ft/s | 0.005924838 kn |
| 0.1 ft/s | 0.0592483801 kn |
| 1 ft/s | 0.5924838013 kn |
| 2 ft/s | 1.1849676027 kn |
| 3 ft/s | 1.777451404 kn |
| 5 ft/s | 2.9624190067 kn |
| 10 ft/s | 5.9248380135 kn |
| 20 ft/s | 11.8496760269 kn |
| 50 ft/s | 29.6241900674 kn |
| 100 ft/s | 59.2483801347 kn |
| 1000 ft/s | 592.4838013471 kn |
Knots vs Feet per Second
| Knot | Foot per Second | |
|---|---|---|
| Symbol | kn | ft/s |
| Equals | 1 kn = 1.68781 ft/s | 1 ft/s = 0.592484 kn |
What is a knot?
Equal to one nautical mile per hour. Used in maritime and aviation navigation worldwide.
What is a foot per second?
Distance in feet covered in one second. Used in US ballistics, engineering, and fluid flow.
Frequently asked questions
How many feet per second are in a knot?
There are 1.68781 feet per second in 1 knot (1 kn = 1.687809857 ft/s).
How many knots are in a foot per second?
There are 0.592484 knots in 1 foot per second (1 ft/s = 0.5924838013 kn).
How do I convert knots to feet per second?
Multiply the number of knots by 1.68781. For example, 10 kn × 1.68781 = 16.8781 ft/s. To convert back, multiply by 0.592484.
What is 10 kn in feet per second?
10 kn = 16.8781 ft/s.
What is 100 kn in feet per second?
100 kn = 168.781 ft/s.
Is the conversion exact?
Yes. The factor comes from the official definitions of both units (NIST SP 811 (2008), derived from the metre, the international mile and the second). Results are shown to up to 10 decimal places; round them to suit your purpose.
Related conversions
Popular speed conversions
- Kilometers per Hour to Miles per Hour
- Miles per Hour to Kilometers per Hour
- Kilometers per Hour to Meters per Second
- Meters per Second to Kilometers per Hour
- Knots to Kilometers per Hour
- Knots to Miles per Hour
- Miles per Hour to Meters per Second
Convert knots to other units
Convert other units to feet per second
- Meters per Second to Feet per Second
- Kilometers per Hour to Feet per Second
- Miles per Hour to Feet per Second
Open the full speed converter with every unit →