Knots to Feet per Second Converter
1 knot ≈ 1.68780986 feet per second
1 knot equals 1.68781 feet per second
How to convert knots to feet per second
Speed combines distance and elapsed time. Knots use the international nautical mile (1852 m), and mph uses the international statute mile (1609.344 m).
ft/s = kn × 1.687809857One knot is 1.687809857 feet per second, so a single multiplication converts any value.
16.8781 ft/s ≈ 10 × 1.687809857Knots to feet per second conversion table
Common values in knots, converted to feet per second.
| Knots (kn) | Feet per second (ft/s) |
|---|---|
| 1 | 1.6878099 |
| 2 | 3.3756197 |
| 3 | 5.0634296 |
| 4 | 6.7512394 |
| 5 | 8.4390493 |
| 10 | 16.878099 |
| 20 | 33.756197 |
| 25 | 42.195246 |
| 50 | 84.390493 |
| 100 | 168.78099 |
| 250 | 421.95246 |
| 500 | 843.90493 |
| 1,000 | 1,687.8099 |
About these units
knotkn
One nautical mile per hour: exactly 1.852 km/h. Used in marine and air navigation.
foot per secondft/s
Used for projectile speeds and in US engineering.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.