cubic foot per second
Volumetric flow rateexact by definition
The cubic foot per second is exactly 0.028316846592 cubic metres per second, about 28.3 L/s or 449 US gpm. It is the unit of surface water hydrology in North America: stream gauging, flood flows, culvert design and water rights are all in cfs.
Watch out: One cfs sustained for a day is 1.983 acre-feet, which is why the western water world calls it a "cfs-day" and treats the near-2 relationship as a rule of thumb.
| 1 | 1,699.0108 |
Where the unit came from
Also called the cusec, and in western US water law the "miner's inch" was defined as a fraction of one, varying by state, which is a good illustration of what happens when a unit is written into statute rather than into physics.
One cubic foot per second in every volumetric flow rate unit
| 2,446,580 | liter per day (L/d) | |
| 1,699,010 | cubic centimeter per minute (cm³/min) | |
| 1,699,010 | milliliter per minute (mL/min) | |
| 646,317 | US gallon per day (gpd) | |
| 103,680 | cubic inch per minute (in³/min) | |
| 101,941 | liter per hour (L/h) | |
| 28,316.8 | milliliter per second (mL/s) | |
| 26,929.9 | US gallon per hour (gph) | |
| 15,388.5 | barrel per day (bbl/d) | |
| 3,600 | cubic foot per hour (cfh) | |
| 2,446.58 | cubic meter per day (m³/d) | |
| 1,699.01 | liter per minute (L/min) | |
| 448.831 | US gallon per minute (gpm) | |
| 373.73 | imperial gallon per minute (imp gpm) | |
| 101.941 | cubic meter per hour (m³/h) | |
| 60 | cubic foot per minute (cfm) | |
| 28.3168 | liter per second (L/s) | |
| 1.98347 | acre-foot per day (ac·ft/d) | |
| 1.69901 | cubic meter per minute (m³/min) | |
| 1 | cubic foot per second (cfs)this unit | |
| 0.646317 | million US gallons per day (MGD) | |
| 0.538171 | million imperial gallons per day (MIGD) | |
| 0.0283168 | cubic meter per second (m³/s) |
Solvers that use volumetric flow rate