Convert Cubic feet per second to Acre-feet per second
Convert Cubic feet per second (ft³/s) to Acre-feet per second (ac-ft/s) instantly and accurately.
Conversion Formula
ac-ft/s = ft³/s × 2.295684114e-5
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 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 second (ft³/s) | Acre-feet per second (ac-ft/s) |
|---|---|
| 1 ft³/s | 2.296 × 10-5 ac-ft/s |
| 2 ft³/s | 4.591 × 10-5 ac-ft/s |
| 5 ft³/s | 0.000114784 ac-ft/s |
| 10 ft³/s | 0.000229568 ac-ft/s |
| 25 ft³/s | 0.000573921 ac-ft/s |
| 50 ft³/s | 0.00114784 ac-ft/s |
| 100 ft³/s | 0.00229568 ac-ft/s |