Convert Acre-feet per day to US gallons per day
Convert Acre-feet per day (ac-ft/d) to US gallons per day (gpd) instantly and accurately.
Conversion Formula
gpd = ac-ft/d × 325851.4286
About Acre-feet per day
The acre-foot per day (ac-ft/d) equals 1233.48183754752/86400 ≈ 0.014278 m³/s, the practical unit for daily water-delivery scheduling in western US irrigation districts and river-compact administration. Water rights in the Colorado River system are specified in acre-feet per year; daily delivery schedules convert to ac-ft/d. A moderate-size irrigation lateral delivers 5-50 ac-ft/d. 1 ac-ft/d ≈ 0.014278 m³/s ≈ 504.2 US gal/min.
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
| Acre-feet per day (ac-ft/d) | US gallons per day (gpd) |
|---|---|
| 1 ac-ft/d | 325851 gpd |
| 2 ac-ft/d | 651703 gpd |
| 5 ac-ft/d | 1629260 gpd |
| 10 ac-ft/d | 3258510 gpd |
| 25 ac-ft/d | 8146290 gpd |
| 50 ac-ft/d | 16292600 gpd |
| 100 ac-ft/d | 32585100 gpd |