Convert Millimetres per Second to Knots
Convert Millimetres per Second (mm/s) to Knots (kn) instantly and accurately.
Conversion Formula
kn = mm/s × 0.001943844492
About Millimetres per Second
A millimetre per second (mm/s) is 10⁻³ m/s - the speed of slow industrial mechanisms and recognisable biological motion. FDM 3D printers move at 40-120 mm/s for perimeters and 150-300 mm/s for infill. Garden snails travel 0.5-1.5 mm/s; earthworms 3-5 mm/s. CNC finishing operations run 1-several hundred mm/s. Hydraulic precision slides work at mm/s for surface preparation. Ultrasound particle velocities in soft tissue are also in this range. 1 mm/s = 10⁻³ m/s.
About Knots
A knot (kn) = 1 nautical mile per hour = 1,852/3,600 m/s ≈ 0.51444 m/s - the universal speed unit for aviation and maritime navigation (ICAO and IMO standard). GA aircraft cruise 100-140 kn; commercial airliners 450-480 kn; Concorde 1,176 kn (Mach 2). Container ships 18-22 kn; QM2 exceeds 30 kn. Beaufort Force 12 hurricane begins at 64 kn. Gulf Stream surface current 2-4 kn. 1 kn = 1.852 km/h = 1.15078 mph.
Quick Reference Table
| Millimetres per Second (mm/s) | Knots (kn) |
|---|---|
| 1 mm/s | 0.00194384 kn |
| 2 mm/s | 0.00388769 kn |
| 5 mm/s | 0.00971922 kn |
| 10 mm/s | 0.0194384 kn |
| 25 mm/s | 0.0485961 kn |
| 50 mm/s | 0.0971922 kn |
| 100 mm/s | 0.194384 kn |