Convert US gallons per day to Acre-feet per day
Convert US gallons per day (gpd) to Acre-feet per day (ac-ft/d) instantly and accurately.
Conversion Formula
ac-ft/d = gpd × 3.068883277e-6
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 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.
Quick Reference Table
| US gallons per day (gpd) | Acre-feet per day (ac-ft/d) |
|---|---|
| 1 gpd | 3.069 × 10-6 ac-ft/d |
| 2 gpd | 6.138 × 10-6 ac-ft/d |
| 5 gpd | 1.534 × 10-5 ac-ft/d |
| 10 gpd | 3.069 × 10-5 ac-ft/d |
| 25 gpd | 7.672 × 10-5 ac-ft/d |
| 50 gpd | 0.000153444 ac-ft/d |
| 100 gpd | 0.000306888 ac-ft/d |