Convert Cubic inches per second to US gallons per minute
Convert Cubic inches per second (in³/s) to US gallons per minute (gpm) instantly and accurately.
Conversion Formula
gpm = in³/s × 0.2597402597
About Cubic inches per second
The cubic inch per second (in³/s) equals 1.6387064×10⁻⁵ m³/s, used in US automotive engineering for engine displacement sweep rate, fuel-injector calibration, and hydraulic actuator speed specifications. An engine injector delivering 15 in³/s of fuel corresponds to roughly 15.5 mL/s; hydraulic jacks in US equipment are rated in in³/s at operating pressure. 1 in³/s ≈ 1.639×10⁻⁵ m³/s = 0.016387 L/s.
About US gallons per minute
The US gallon per minute (gpm) equals 3.785411784×10⁻³/60 ≈ 6.309×10⁻⁵ m³/s, the dominant volumetric flow unit in US plumbing, HVAC, and water-treatment industries. EPA showerhead standards are set at 2.5 gpm; residential water meters size at 3/4"-1" for 5-20 gpm; municipal water-distribution design uses hundreds to thousands of gpm. 1 gpm ≈ 6.309×10⁻⁵ m³/s = 3.785 L/min.
Quick Reference Table
| Cubic inches per second (in³/s) | US gallons per minute (gpm) |
|---|---|
| 1 in³/s | 0.25974 gpm |
| 2 in³/s | 0.519481 gpm |
| 5 in³/s | 1.2987 gpm |
| 10 in³/s | 2.5974 gpm |
| 25 in³/s | 6.49351 gpm |
| 50 in³/s | 12.987 gpm |
| 100 in³/s | 25.974 gpm |