Convert Cubic feet per second to Acre-feet per day
Convert Cubic feet per second (ft³/s) to Acre-feet per day (ac-ft/d) instantly and accurately.
Conversion Formula
ac-ft/d = ft³/s × 1.983471074
About Cubic feet per second
The cubic foot per second (ft³/s or cfs) equals 0.028316846592 m³/s, the primary unit for measuring river discharge and open-channel flow in the United States. The US Geological Survey publishes all streamflow data in cfs; irrigation water rights, flood-control gates, and dam spillway capacities are specified in cfs. The Colorado River at full natural flow is ≈22 000 cfs. 1 cfs = 0.028316846592 m³/s ≈ 28.317 L/s ≈ 448.8 US gpm.
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
| Cubic feet per second (ft³/s) | Acre-feet per day (ac-ft/d) |
|---|---|
| 1 ft³/s | 1.98347 ac-ft/d |
| 2 ft³/s | 3.96694 ac-ft/d |
| 5 ft³/s | 9.91736 ac-ft/d |
| 10 ft³/s | 19.8347 ac-ft/d |
| 25 ft³/s | 49.5868 ac-ft/d |
| 50 ft³/s | 99.1736 ac-ft/d |
| 100 ft³/s | 198.347 ac-ft/d |