Convert US gallons per day to Cubic metres per day
Convert US gallons per day (gpd) to Cubic metres per day (m³/d) instantly and accurately.
Conversion Formula
m³/d = gpd × 0.003785411784
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 day
The cubic metre per day (m³/d) equals 1/86400 ≈ 1.157×10⁻⁵ m³/s, standard in water-resource management, desalination-plant capacity, and per-capita water-consumption accounting. A municipal desalination plant may produce 100 000-1 000 000 m³/d; the WHO minimum water supply requirement is 0.05 m³/d per person. 1 m³/d ≈ 1.157×10⁻⁵ m³/s = 264.2 US gal/d.
Quick Reference Table
| US gallons per day (gpd) | Cubic metres per day (m³/d) |
|---|---|
| 1 gpd | 0.00378541 m³/d |
| 2 gpd | 0.00757082 m³/d |
| 5 gpd | 0.0189271 m³/d |
| 10 gpd | 0.0378541 m³/d |
| 25 gpd | 0.0946353 m³/d |
| 50 gpd | 0.189271 m³/d |
| 100 gpd | 0.378541 m³/d |