Convert Cubic inches per hour to US gallons per hour
Convert Cubic inches per hour (in³/h) to US gallons per hour (gph) instantly and accurately.
Conversion Formula
gph = in³/h × 0.004329004329
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 hour
The US gallon per hour (gph) equals 3.785411784×10⁻³/3600 ≈ 1.051×10⁻⁶ m³/s, common in oil-burner nozzle ratings, water-softener regeneration, and RV/marine-plumbing specifications. Residential oil-burner nozzles are rated in gph (e.g., 0.75 gph, 1.00 gph); a small boat bilge pump might handle 200-500 gph. 1 US gph ≈ 1.052×10⁻⁶ m³/s ≈ 3.785 L/h.
Quick Reference Table
| Cubic inches per hour (in³/h) | US gallons per hour (gph) |
|---|---|
| 1 in³/h | 0.004329 gph |
| 2 in³/h | 0.00865801 gph |
| 5 in³/h | 0.021645 gph |
| 10 in³/h | 0.04329 gph |
| 25 in³/h | 0.108225 gph |
| 50 in³/h | 0.21645 gph |
| 100 in³/h | 0.4329 gph |