Convert Cubic inches per hour to US gallons per minute
Convert Cubic inches per hour (in³/h) to US gallons per minute (gpm) instantly and accurately.
Conversion Formula
gpm = in³/h × 7.215007215e-5
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.
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 hour (in³/h) | US gallons per minute (gpm) |
|---|---|
| 1 in³/h | 7.215 × 10-5 gpm |
| 2 in³/h | 0.0001443 gpm |
| 5 in³/h | 0.00036075 gpm |
| 10 in³/h | 0.000721501 gpm |
| 25 in³/h | 0.00180375 gpm |
| 50 in³/h | 0.0036075 gpm |
| 100 in³/h | 0.00721501 gpm |