Convert Feet per Second to Knots (ft/s to kn)
1 foot per second (ft/s) = 0.5924838013 knots (kn). 1 kn = 1.687809857 ft/s. Example: 15 ft/s = 15 × 0.5924838013 = 8.887257019 kn.
Also searched as feet per second to kn, feet per second in kn, feet per second into knots, ft/s to kn, ft/s in knots, ft/s into knot, foot per second to knot, ft/s to knots converter and how many knots in a foot per second.
1 ft/s = 0.5924838013 kn
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk foot per second to knot converter to paste a column from Excel.
How to Convert Foot per Second to Knot
- 1 ft/s = 0.5924838013 kn
- 1 kn = 1.687809857 ft/s
- Example: convert 15 ft/s to kn: 15 ft/s = 15 × 0.5924838013 kn = 8.887257019 kn
Formula
kn = ft/s × 0.5924838012959
or kn = ft/s ÷ 1.687809857101
Derivation from SI units:
- 1 ft/s = 0.3048 m/s exactly.
- 1 knot = 1 nautical mile (1852 m) per hour = 0.514444… m/s.
- 1 ft/s = 0.3048 m/s ÷ 0.5144444444444 m/s per kn = 0.5924838012959 kn
Both units are defined exactly, so the factor is exact. Foot per Second definition: foot per second; Knot definition: knot.
Worked examples
- A reading of 20 ft/s converts to 11.84967603 kn.
20 ft/s × 0.5924838013 = 11.84967603 kn - A value of 100 ft/s is 59.24838013 kn.
100 ft/s × 0.5924838013 = 59.24838013 kn
Foot per Second to Knot conversion table
| Feet per Second (ft/s) | Knots (kn) |
|---|---|
| 1 ft/s | 0.5924838013 kn |
| 5 ft/s | 2.962419006 kn |
| 10 ft/s | 5.924838013 kn |
| 20 ft/s | 11.84967603 kn |
| 50 ft/s | 29.62419006 kn |
| 88 ft/s | 52.13857451 kn |
| 100 ft/s | 59.24838013 kn |
| 500 ft/s | 296.2419006 kn |
| 1000 ft/s | 592.4838013 kn |
| 1125 ft/s | 666.5442765 kn |
Where it's used
Feet per Second are used for muzzle velocity and ballistics, while knots appear in aviation and marine navigation. Both measure speed (distance per time), so the conversion is a fixed factor.
Foot per Second to other speed units
| Conversion | 1 ft/s equals |
|---|---|
| foot per second to knot | 0.5924838013 kn |
| foot per second to meter per second | 0.3048 m/s |
| foot per second to kilometer per hour | 1.09728 km/h |
| foot per second to mile per hour | 0.6818181818 mph |
Frequently asked questions
How many knots are in 1 foot per second?
1 ft/s = 0.5924838013 kn.
How do I convert feet per second to knots?
Multiply the value in ft/s by 0.5924838013, or divide it by 1.687809857. For example, 15 ft/s × 0.5924838013 = 8.887257019 kn.
Is the ft/s to kn conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "foot per second".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (radian) and Table 8 (non-SI units accepted for use with the SI).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Feet per Second to Knots (ft/s to kn). Retrieved October 25, 2026, from https://scientificconverters.com/speed/feet-per-second-to-knots/
IEEE
Scientific Converters, "Convert Feet per Second to Knots (ft/s to kn)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/speed/feet-per-second-to-knots/