These calculators provide an approximation only and should only be used for reference.

To use affinity template fill in RPM and Dia. blanks. Ratios are automatically calculated. Enter old GPM, TDH and BHP if required. New values will calculate when you move out of the cell. Use TAB or SHIFT TAB to move from cell to cell.


C is the ratio of diameter and/or speed. It will automaticly appear when the table is filled in.



Odessa, Texas

3209 West County Road
Odessa, Texas 79764
(432) 333-2817

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