Convert US gallons per day to Cubic metres per hour
Convert US gallons per day (gpd) to Cubic metres per hour (m³/h) instantly and accurately.
Conversion Formula
m³/h = gpd × 0.000157725491
About US gallons per day
The US gallon per day (gpd) equals 3.785411784×10⁻³/86400 ≈ 4.381×10⁻⁸ m³/s, the standard unit in US water-utility regulation and residential water-well pump sizing. The US national average residential water use is about 80-100 gpd per person; a reverse-osmosis membrane module is rated in gpd (50-100 gpd for domestic units). 1 US gpd ≈ 4.381×10⁻⁸ m³/s.
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 day (gpd) | Cubic metres per hour (m³/h) |
|---|---|
| 1 gpd | 0.000157725 m³/h |
| 2 gpd | 0.000315451 m³/h |
| 5 gpd | 0.000788627 m³/h |
| 10 gpd | 0.00157725 m³/h |
| 25 gpd | 0.00394314 m³/h |
| 50 gpd | 0.00788627 m³/h |
| 100 gpd | 0.0157725 m³/h |