Feet per Second to Knots Converter
Convert feet per second to knots — divide by 1.688. Results update as you type; exact factors shown.
One foot per second is 0.5925 knots — see the exact factor, not a rounded rule of thumb.
How the feet per second to knots converter works
Speeds convert through metres per second. 1 km/h is 1000/3600 m/s; 1 mph is 1609.344/3600 m/s; a knot is one nautical mile (1,852 m) per hour. Mach is shown against the standard sea-level speed of sound of 340.29 m/s and varies with altitude and temperature.
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
Common speed conversions
| From | To | Units |
|---|---|---|
| 1 ft/s | 0.5925 kn | foot per second to knots |
| 5 ft/s | 2.9624 kn | feet per second to knots |
| 10 ft/s | 5.9248 kn | feet per second to knots |
| 17 ft/s | 10.0722 kn | feet per second to knots |
| 25 ft/s | 14.8121 kn | feet per second to knots |
| 34 ft/s | 20.1444 kn | feet per second to knots |
| 50 ft/s | 29.6242 kn | feet per second to knots |
| 68 ft/s | 40.2889 kn | feet per second to knots |
| 84 ft/s | 49.7686 kn | feet per second to knots |
| 100 ft/s | 59.2484 kn | feet per second to knots |
| 200 ft/s | 118.4968 kn | feet per second to knots |
| 500 ft/s | 296.2419 kn | feet per second to knots |
Units in this converter and their exact factors
| Unit | Symbol | One unit in metre per seconds |
|---|---|---|
| metre per second | m/s | 1 metre per second |
| kilometre per hour | km/h | 0.2777777778 metre per second |
| mile per hour | mph | 0.44704 metre per second |
| knot | kn | 0.5144444444 metre per second |
| foot per second | ft/s | 0.3048 metre per second |
| Mach (sea level, 15 °C) | Ma | 340.29 metre per second |
FAQFrequently asked questions about speed conversion
How many knots is 10 ft/s?
5.92 knots.
What is 84 ft/s?
About 50 knots.
Why convert?
Wind speeds are reported in knots in aviation and marine forecasts but in ft/s in some US engineering standards.
What is a knot in m/s?
0.5144 m/s.
What is 100 ft/s in knots?
59.2 knots.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.