Convert US gallons per day to Acre-feet per minute
Convert US gallons per day (gpd) to Acre-feet per minute (ac-ft/min) instantly and accurately.
Conversion Formula
ac-ft/min = gpd × 2.131168943e-9
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 minute
The acre-foot per minute (ac-ft/min) equals 1233.48183754752/60 ≈ 20.558 m³/s, encountered in large irrigation canal capacity descriptions and reservoir emergency spillway sizing in the US West. A major canal gate releasing 1 ac-ft/min drains a 1-acre field 1 foot deep every minute - a substantial agricultural flow. 1 ac-ft/min ≈ 20.558 m³/s ≈ 726.0 ft³/s.
Quick Reference Table
| US gallons per day (gpd) | Acre-feet per minute (ac-ft/min) |
|---|---|
| 1 gpd | 2.131 × 10-9 ac-ft/min |
| 2 gpd | 4.262 × 10-9 ac-ft/min |
| 5 gpd | 1.066 × 10-8 ac-ft/min |
| 10 gpd | 2.131 × 10-8 ac-ft/min |
| 25 gpd | 5.328 × 10-8 ac-ft/min |
| 50 gpd | 1.066 × 10-7 ac-ft/min |
| 100 gpd | 2.131 × 10-7 ac-ft/min |