Speed / ft/s → kn
Convert Feet per second to Knots
Convert linear speeds in metric, customary, and nautical units. Convert Feet per second (ft/s) to Knots (kn). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Knots to Feet per second →
How to convert feet per second to knots
A knot is one international nautical mile (1852 meters) per hour. Mach is excluded because the speed of sound depends on the medium and conditions.
Use x for the value in ft/s, b for the intermediate value in m/s, and y for the result in kn.
kn = ft/s × 0.3048 ÷ 0.5144444444444445
Worked examples
10 ft/s ≈ 5.92483801296 kn
Step 1: (10 × 0.3048) ≈ 3.048 m/s.
Step 2: 3.048 ÷ 0.514444444444 ≈ 5.92483801296 kn.20 ft/s ≈ 11.8496760259 kn
Step 1: (20 × 0.3048) ≈ 6.096 m/s.
Step 2: 6.096 ÷ 0.514444444444 ≈ 11.8496760259 kn.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Feet per second
Feet per second (ft/s) measures speed under the conventions above. The base value in m/s is (x × 0.3048), where x is the numerical value in ft/s. Factors shown here are rounded for display; calculations use the stored factor.
About Knots
Knots (kn) measures speed under the conventions above. The base value in m/s is (x × 0.514444444444), where x is the numerical value in kn. Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Feet per second to knots reference table
| Feet per second (ft/s) | Knots (kn) |
|---|---|
| 1 | 0.592483801296 |
| 5 | 2.96241900648 |
| 10 | 5.92483801296 |
| 25 | 14.8120950324 |
| 50 | 29.6241900648 |
| 100 | 59.2483801296 |
| 1000 | 592.483801296 |
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