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Online Water Calculator to Convert AFA into GPM, CFS or CFM 

The free calculator on this page will convert acre feet per annum (AFA) into gallons per minute (gpm), cubic feet per second (cfs) or cubic feet per minute (cfm).  The calculator is easy to use and should save you some time.

AFA Conversion Calculator

Formulas Used in the Calculator
1 AFA = 0.62 gpm
1 AFA = 0.00138 CFS
1 AFA = 0.8288 CFM

DISCLAIMER: Use at your own risk, and doublecheck the math with your own calculator. You should also check with your hydrologist or water lawyer to make sure that the formulas are correct for your state. The calculator will work with Internet Explorer, Firefox and Netscape 6.0 (and higher).

 How to use the calculator. (1) Enter the number of AFA you wish to convert in the top of the form. DO NOT USE COMMAS. (2) Select gpm, CFS, or CFM. (3) Click "Calculate. The converted expression will appear in the last box (conversion). If you selected CFS, the converted figure is an expression in CFS. To recalculate with a different expression (for example, gpm instead of CFS), be sure to select gpm, and click the calculate button again so that the math will reset. If you don't understand this, experiment using 1 AFA. The results will match the formula above.

Total number of AFA
AFA Conversions
Conversion


 

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