Convert UK gallons per day to Acre-feet per second
Convert UK gallons per day (gpd) to Acre-feet per second (ac-ft/s) instantly and accurately.
Conversion Formula
ac-ft/s = gpd × 4.265711971e-11
About UK gallons per day
The UK gallon per day (gpd) equals 4.54609×10⁻³/86400 ≈ 5.261×10⁻⁸ m³/s, used in British per-capita water-consumption statistics and pre-metric water-authority regulation. Historic UK Water Acts set minimum supply standards in UK gal/d per household; older UK borehole pump test reports quote sustained yield in UK gal/d. 1 UK gpd ≈ 5.261×10⁻⁸ m³/s.
About Acre-feet per second
The acre-foot per second (ac-ft/s) equals 1233.48183754752 m³/s, an enormous unit representing the flow that would fill a football-field-sized area to 1 ft depth every second. It appears in descriptions of exceptionally large dam-break flood waves and major river-system extreme events. The 1976 Teton Dam collapse peak outflow was estimated at ≈65 000 ft³/s ≈ 1.49 ac-ft/s. 1 ac-ft/s = 1 233.48 m³/s.
Quick Reference Table
| UK gallons per day (gpd) | Acre-feet per second (ac-ft/s) |
|---|---|
| 1 gpd | 4.266 × 10-11 ac-ft/s |
| 2 gpd | 8.531 × 10-11 ac-ft/s |
| 5 gpd | 2.133 × 10-10 ac-ft/s |
| 10 gpd | 4.266 × 10-10 ac-ft/s |
| 25 gpd | 1.066 × 10-9 ac-ft/s |
| 50 gpd | 2.133 × 10-9 ac-ft/s |
| 100 gpd | 4.266 × 10-9 ac-ft/s |