Convert Inches per Minute to Feet per Second
Convert Inches per Minute (in/min) to Feet per Second (ft/s) instantly and accurately.
Conversion Formula
ft/s = in/min × 0.001388888889
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 Feet per Second
A foot per second (ft/s) = exactly 0.3048 m/s - the primary speed unit in US ballistics, hydraulics, and gas dynamics. .308 Winchester muzzle velocity ~2,750 ft/s; 9mm pistol 1,200-1,400 ft/s; .50 BMG 2,910 ft/s. Speed of sound at sea level 1,116 ft/s. River channel mean velocities 0.5-6 ft/s; NFPA sprinkler pipe flows also in ft/s. 1 ft/s = 0.3048 m/s = 1.09728 km/h = 60 ft/min.
Quick Reference Table
| Inches per Minute (in/min) | Feet per Second (ft/s) |
|---|---|
| 1 in/min | 0.00138889 ft/s |
| 2 in/min | 0.00277778 ft/s |
| 5 in/min | 0.00694444 ft/s |
| 10 in/min | 0.0138889 ft/s |
| 25 in/min | 0.0347222 ft/s |
| 50 in/min | 0.0694444 ft/s |
| 100 in/min | 0.138889 ft/s |