Convert US gallons per minute to Cubic inches per hour
Convert US gallons per minute (gpm) to Cubic inches per hour (in³/h) instantly and accurately.
Conversion Formula
in³/h = gpm × 13860
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 hour
The cubic inch per hour (in³/h) equals 1.6387064×10⁻⁵/3600 ≈ 4.552×10⁻⁹ m³/s, appearing in US oilfield plunger-pump capacity datasheets and slow hydraulic-actuator specifications. It is also used in US ASTM leak-test standards where maximum allowable leakage past a valve seal is expressed in in³/h at rated pressure. 1 in³/h ≈ 4.552×10⁻⁹ m³/s.
Quick Reference Table
| US gallons per minute (gpm) | Cubic inches per hour (in³/h) |
|---|---|
| 1 gpm | 13860 in³/h |
| 2 gpm | 27720 in³/h |
| 5 gpm | 69300 in³/h |
| 10 gpm | 138600 in³/h |
| 25 gpm | 346500 in³/h |
| 50 gpm | 693000 in³/h |
| 100 gpm | 1386000 in³/h |