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volume = height * (length*width - nHexagons * areaOfASingleHexagon)
The area of a hexagon is 3*sqrt(3)/2*a^2, where a is the length of one side.
But really you're going to make too much epoxy, so just get it close and then add a little more to be safe. I'm guessing you've done this before, but if you don't degas your epoxy before you pour it, you're not going to get the results you want.
>>16973
Why the everloving fuck would you subject anyone to the imperial system and then use a conversion calculator when he can measure in centimeters and then end up with volume in cubic centimeters, which is already equal to the volume in mL by definition?