Convert US quarts per hour to US gallons per hour
Convert US quarts per hour (qt/h) to US gallons per hour (gph) instantly and accurately.
Conversion Formula
gph = qt/h × 0.25
About US quarts per hour
The US quart per hour (qt/h) equals 3.785411784×10⁻³/4/3600 ≈ 2.629×10⁻⁷ m³/s, used in US agricultural irrigation drippers (emitters rated in qt/h) and hobby aquaculture systems. A drip emitter rated 1 qt/h ≈ 0.946 L/h is a common size for garden irrigation in the US market. 1 US qt/h ≈ 2.629×10⁻⁷ 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
| US quarts per hour (qt/h) | US gallons per hour (gph) |
|---|---|
| 1 qt/h | 0.25 gph |
| 2 qt/h | 0.5 gph |
| 5 qt/h | 1.25 gph |
| 10 qt/h | 2.5 gph |
| 25 qt/h | 6.25 gph |
| 50 qt/h | 12.5 gph |
| 100 qt/h | 25 gph |