Convert Inches per Minute to Nautical Miles per Second
Convert Inches per Minute (in/min) to Nautical Miles per Second (nmi/s) instantly and accurately.
Conversion Formula
nmi/s = in/min × 2.285817135e-7
About Inches per Minute
An inch per minute (in/min) ≈ 0.4233 mm/s - the standard North American machining feed unit for slow precision cuts. CNC milling in titanium or nickel superalloys: HSS roughing 2-8 in/min; carbide finishing 15-40 in/min. Thread-tapping feeds are calculated in in/min from pitch × RPM. Hydraulic press platen closure for rubber moulding and laminate pressing: 0.05-2 in/min. 1 in/min = 0.0254 m/min ≈ 4.233 × 10⁻⁴ m/s.
About Nautical Miles per Second
A nautical mile per second (nmi/s) equals exactly 1,852 m/s - squarely in the hypersonic domain at approximately Mach 5.44 (ISA sea level). At this speed, kinetic energy per kilogram is ½ × 1852² ≈ 1.71 MJ/kg, comparable to a small shaped-charge detonation. Ballistic missile re-entry vehicles descend at roughly 3.8-7 nmi/s during the terminal phase; ICBM warheads at peak re-entry travel near 4-6 nmi/s. The US Navy's electromagnetic railgun programme aimed to accelerate 10 kg projectiles to approximately 1.7-2.5 nmi/s in test firings, giving them sufficient kinetic energy to destroy armoured targets without a warhead. Hypervelocity impact experiments at two-stage light-gas gun facilities reach similar speeds to simulate asteroid-impact cratering physics. The speed of sound in beryllium metal (the fastest known bulk acoustic medium) is approximately 12.9 nmi/s. 1 nmi/s = 1,852 m/s = 6,667.2 km/h = 3,600 kn ≈ Mach 5.44.
Quick Reference Table
| Inches per Minute (in/min) | Nautical Miles per Second (nmi/s) |
|---|---|
| 1 in/min | 2.286 × 10-7 nmi/s |
| 2 in/min | 4.572 × 10-7 nmi/s |
| 5 in/min | 1.143 × 10-6 nmi/s |
| 10 in/min | 2.286 × 10-6 nmi/s |
| 25 in/min | 5.715 × 10-6 nmi/s |
| 50 in/min | 1.143 × 10-5 nmi/s |
| 100 in/min | 2.286 × 10-5 nmi/s |