Knots to Feet per Second Converter
Enter the speed in knots below to convert it to feet per second.
Convert Knots to Feet per Second
Enter a value in knots (kn) to convert to feet per second (ft/s).
Knot to Feet per Second Conversion Table
Table showing various knot measurements converted to feet per second. Click any preset value or arrow to load it into the converter.
| Knots (kn) | Feet per Second (ft/s) |
|---|---|
| 1 kn | 1.6878099 ft/s |
| 2 kn | 3.3756197 ft/s |
| 2.5 kn | 4.2195246 ft/s |
| 5 kn | 8.4390493 ft/s |
| 10 kn | 16.8780986 ft/s |
| 15 kn | 25.3171479 ft/s |
| 20 kn | 33.7561971 ft/s |
| 25 kn | 42.1952464 ft/s |
| 30 kn | 50.6342957 ft/s |
| 50 kn | 84.3904929 ft/s |
How to Convert Knots to Feet per Second
To convert knots to feet per second, multiply the speed by the following conversion ratio: 1.6878099 feet per second/knot.
Since one knot is equal to 1.6878099 feet per second, you can use this simple formula to convert:
The speed in feet per second is equal to the speed in knots multiplied by 1.6878099.
For example, here's how to convert 5 knots to feet per second using the formula above.
How Many Feet per Second Are in a Knot?
There are 1.6878099 feet per second in a knot, which is why we use this value in the formula above.
Our knot to feet per second calculator automatically converts your speed measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Knots and feet per second are both units used to measure speed. Keep reading to learn more about each unit.
What Is a Knot?
A knot is a unit of speed equal to 0.5144444 meters per second (m/s), the base unit for speed. One nautical mile per hour (1.852 km/h = 0.514444 m/s). [1]
The knot is classified as a standard unit of speed. Knots can be abbreviated as kn; for example, 1 knot can be written as 1 kn.
When working with knots (kn) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, knots (kn) are widely used across standard speed applications within international standard workflows, engineering documentation, and technical data sheets.
What Is a Feet per Second?
A feet per second is a unit of speed equal to 0.3048 meters per second (m/s), the base unit for speed. Equal to 0.3048 m/s. [2]
The feet per second is classified as a US customary and imperial unit of speed. Feet per Second can be abbreviated as ft/s; for example, 1 feet per second can be written as 1 ft/s.
When working with feet per second (ft/s) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, feet per second (ft/s) are widely used across standard speed applications within US customary and imperial workflows, engineering documentation, and technical data sheets.
When converting speed between knots (kn) and feet per second (ft/s), keep full floating-point precision (1 kn = 1.6878099 ft/s; 1 ft/s = 0.5924838 kn) during intermediate calculations and round only the final feet per second figure to match your instrument tolerance.
More Knot & Feet per Second Conversions
Need to calculate in the opposite direction? Use our feet per second to knots calculator to switch your starting unit immediately. You can also explore related tools such as converting feet per second to knots, converting miles per hour to feet per second, or converting knots to miles per hour.
Convert from Knots
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Velocity))·Speed Metrology Standard — Knots (kn) to Feet per Second (ft/s)
- [2]NIST OWM SpecificationNIST OWM (SI Units — Length & Distance)·Unit Specifications: Knot (kn) & Feet per Second (ft/s)
- [3]NIST CUU ReferenceNIST CUU (SI Coherent Derived Units (m/s))·Conversion Factors & Mathematical Basis (kn to ft/s)