Square cake pans instead of round

[Bodenbabe]

I have to make 3 cakes of the same recipe, 2 x 8" square and 1 x 9" round. My recipe is for an 8" round cake. I have read a formula for working it all out but it involves pi and working it out for every ingredient and so on and, quite frankly, I can't be arsed. I know where to fill the tins to, so is there anything to stop me making one huge load of cake batter at the right proprtions (eg. multiplying original recipe by 3) and then just filling up each tin to the right point?

Bodenbabe, even if you can't be arsed to work it out, you are going to be correct anyway. A 9" Round pan is, near as damn it (within 1/2 Square inch), the same volume as an 8" Square pan. Multiplying the recipe by 3 will do it.

Oh that's great, thanks silverwood! That makes sense actually, as I suppose a circle is just a square with the corners chopped off