here is my current formula:
=ROUND(IF(AND(D7="Gallons",D8="O.D."),(B7*231)/(0.7854*B8^2),IF(AND(D7="O.D.",D8="Gallons"),(B8*2 31)/(0.7854*B7^2),IF(AND(D7="Straight
Side",D8="Gallons"),((B8*231)/(0.7854*B7))^0.5,IF(AND(D7="Gallons",D8="Straight
Side"),((231*B7)/(0.7854*B8))^0.5,IF(AND(D7="O.D.",D8="Straight
Side"),(0.7854*B7^2*B8)/231,(0.7854*B8^2*B7)/231))))),4)

this was working great until I was asked to add another constraint.
This calculates diameter or height or gallons depending on what was
entered. Problem is that this was set up for input of inches and now
the input can be either inches or feet. These formulas only work for
inches. Now I need to check to see if the user inputed inches or feet
and I can't fit that many if statements into this.
Any suggestions?
I know theres a better way to do this, but am at a loss.
Thanks
Lisa


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