Convert Cubic feet per day to Acre-feet per second
Convert Cubic feet per day (ft³/d) to Acre-feet per second (ac-ft/s) instantly and accurately.
Conversion Formula
ac-ft/s = ft³/d × 2.657041798e-10
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 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
| Cubic feet per day (ft³/d) | Acre-feet per second (ac-ft/s) |
|---|---|
| 1 ft³/d | 2.657 × 10-10 ac-ft/s |
| 2 ft³/d | 5.314 × 10-10 ac-ft/s |
| 5 ft³/d | 1.329 × 10-9 ac-ft/s |
| 10 ft³/d | 2.657 × 10-9 ac-ft/s |
| 25 ft³/d | 6.643 × 10-9 ac-ft/s |
| 50 ft³/d | 1.329 × 10-8 ac-ft/s |
| 100 ft³/d | 2.657 × 10-8 ac-ft/s |