| Have a search for Nigel H on here, and his Blender application. Very easy to use.
Alternatively, if you have Excel (or a pen and a bit of paper) then you can work it out from basic principles - just break down the gas into the separate O2 and N2 components and go from there.
Alternatively, if you're just topping up a mix, you could always go with the approach of just seing what you come out with, as you'll presumably always want to get the strongest mix possible anyway - just top it up and see what comes out.
As a slight side question, is this twin 12's or something smaller? Can't think of many dives you'd do using 32% (so necessarily not that deep) where you'd need a top-up for the second dive - should easily get two hour long dives out of twin 12's, and then you're keeping the best mix for the 2nd dive too.
David |