Convert US gallons per minute to Cubic metres per hour
Convert US gallons per minute (gpm) to Cubic metres per hour (m³/h) instantly and accurately.
Conversion Formula
m³/h = gpm × 0.227124707
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 metres per hour
The cubic metre per hour (m³/h) equals 1/3600 m³/s ≈ 2.778×10⁻⁴ m³/s, the dominant volumetric flow unit in European process engineering, HVAC, and water treatment. Pump datasheet curves, heat-exchanger sizing software, and wastewater-treatment design all use m³/h as the standard. A domestic water pump runs at 3-8 m³/h; a municipal WWTP inlet pump handles 500-5 000 m³/h. 1 m³/h ≈ 2.778×10⁻⁴ m³/s = 1 000 L/h.
Quick Reference Table
| US gallons per minute (gpm) | Cubic metres per hour (m³/h) |
|---|---|
| 1 gpm | 0.227125 m³/h |
| 2 gpm | 0.454249 m³/h |
| 5 gpm | 1.13562 m³/h |
| 10 gpm | 2.27125 m³/h |
| 25 gpm | 5.67812 m³/h |
| 50 gpm | 11.3562 m³/h |
| 100 gpm | 22.7125 m³/h |