Convert Cubic feet per day to US gallons per day
Convert Cubic feet per day (ft³/d) to US gallons per day (gpd) instantly and accurately.
Conversion Formula
gpd = ft³/d × 7.480519481
About Cubic feet per day
The cubic foot per day (ft³/d) equals 0.028316846592/86400 ≈ 3.277×10⁻⁷ m³/s, found in US oil-and-gas production reports for low-rate gas wells and groundwater monitoring wells. A marginal coalbed-methane well producing 50 Mcf/d (50 000 ft³/d) of gas represents a modest but economic flow; residential water-well yield tests report in ft³/d. 1 ft³/d ≈ 3.277×10⁻⁷ m³/s.
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.
Quick Reference Table
| Cubic feet per day (ft³/d) | US gallons per day (gpd) |
|---|---|
| 1 ft³/d | 7.48052 gpd |
| 2 ft³/d | 14.961 gpd |
| 5 ft³/d | 37.4026 gpd |
| 10 ft³/d | 74.8052 gpd |
| 25 ft³/d | 187.013 gpd |
| 50 ft³/d | 374.026 gpd |
| 100 ft³/d | 748.052 gpd |