Convert US gallons per minute to Cubic inches per second
Convert US gallons per minute (gpm) to Cubic inches per second (in³/s) instantly and accurately.
Conversion Formula
in³/s = gpm × 3.85
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.
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.
Quick Reference Table
| US gallons per minute (gpm) | Cubic inches per second (in³/s) |
|---|---|
| 1 gpm | 3.85 in³/s |
| 2 gpm | 7.7 in³/s |
| 5 gpm | 19.25 in³/s |
| 10 gpm | 38.5 in³/s |
| 25 gpm | 96.25 in³/s |
| 50 gpm | 192.5 in³/s |
| 100 gpm | 385 in³/s |