Convert Knots per second to Millimetres per second squared
Convert Knots per second (kn/s) to Millimetres per second squared (mm/s²) instantly and accurately.
Conversion Formula
mm/s² = kn/s × 514.4444444
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 Millimetres per second squared
The millimetre per second squared (mm/s²) equals 10⁻³ m/s², the standard unit for vibration acceleration in machine condition monitoring. ISO 10816 and ISO 20816 define machinery vibration limits in mm/s and mm/s²; ISO 10816-3 Zone A boundary for industrial machinery is ≈32 mm/s² at 2.2 Hz. Seismically, MMI VI ground shaking (masonry damage threshold) corresponds to 620-1250 mm/s² peak ground acceleration. 1 mm/s² = 10⁻³ m/s² ≈ 1.02 × 10⁻⁴ g₀.
Quick Reference Table
| Knots per second (kn/s) | Millimetres per second squared (mm/s²) |
|---|---|
| 1 kn/s | 514.444 mm/s² |
| 2 kn/s | 1028.89 mm/s² |
| 5 kn/s | 2572.22 mm/s² |
| 10 kn/s | 5144.44 mm/s² |
| 25 kn/s | 12861.1 mm/s² |
| 50 kn/s | 25722.2 mm/s² |
| 100 kn/s | 51444.4 mm/s² |