Convert Feet per Second to Inches per Second
Convert Feet per Second (ft/s) to Inches per Second (in/s) instantly and accurately.
Conversion Formula
in/s = ft/s × 12
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.
About Inches per Second
An inch per second (in/s) = exactly 0.0254 m/s = 25.4 mm/s. Professional reel-to-reel audio tape runs at 15 or 30 IPS; consumer tape decks at 1⅞ IPS; VHS at ~1.3 IPS. High-speed CNC axes rapid at 800-1,200 in/min ≈ 13-20 in/s. Pneumatic cylinder speeds and robotic end-effector approach speeds in US assembly plants are programmed in in/s. 1 in/s = 0.0254 m/s = 5 ft/min.
Quick Reference Table
| Feet per Second (ft/s) | Inches per Second (in/s) |
|---|---|
| 1 ft/s | 12 in/s |
| 2 ft/s | 24 in/s |
| 5 ft/s | 60 in/s |
| 10 ft/s | 120 in/s |
| 25 ft/s | 300 in/s |
| 50 ft/s | 600 in/s |
| 100 ft/s | 1200 in/s |