Convert Knots per second to Feet per second squared
Convert Knots per second (kn/s) to Feet per second squared (ft/s²) instantly and accurately.
Conversion Formula
ft/s² = kn/s × 1.687809857
About Knots per second
The knot per second (kn/s) equals 1852/3600 m/s² ≈ 0.5144 m/s², used in aviation and maritime operations where speed is measured in knots. Aircraft carrier catapult launches accelerate an F/A-18 from 0 to ~150 kn in 2-2.5 s, giving 60-75 kn/s ≈ 31-39 m/s². A commercial jet rejected takeoff from V1 (~145 kn) to rest in ≈25 s decelerates at 5-6 kn/s ≈ 2.6-3.1 m/s². 1 kn/s = 463/900 m/s² ≈ 5.25 × 10⁻² g₀.
About Feet per second squared
The foot per second squared (ft/s²) equals exactly 0.3048 m/s², the coherent acceleration unit in the imperial engineering system where F [lbf] = m [slug] × a [ft/s²]. Standard gravity is g₀ = 32.174 ft/s², a constant used throughout US aerospace and structural engineering - from legacy NACA reports to modern software (SAP2000, ETABS with US units). A car braking at 0.8 g decelerates at about 25.7 ft/s². 1 ft/s² = 0.3048 m/s² ≈ 3.108 × 10⁻² g₀.
Quick Reference Table
| Knots per second (kn/s) | Feet per second squared (ft/s²) |
|---|---|
| 1 kn/s | 1.68781 ft/s² |
| 2 kn/s | 3.37562 ft/s² |
| 5 kn/s | 8.43905 ft/s² |
| 10 kn/s | 16.8781 ft/s² |
| 25 kn/s | 42.1952 ft/s² |
| 50 kn/s | 84.3905 ft/s² |
| 100 kn/s | 168.781 ft/s² |