Looking to calculate measurements for your duplet square pack design? Within our ‘Duplet Square Pack explained‘ video you will find a long format video explaining the method AND how to measure your design before and during any build.

What most users don’t know is that this video also has two supporting documents, one is a graphic showing how large each column will be based on a set inflation size. The other is a xls spreadsheet for you to input your design balloon count and it will tell you the finished size based on balloon inflation size. You get to see real time how large your design will be with 4″, 4.5″, 5″, 7.5″ and 9″ sized balloons!

Example with a duplet guitar design:

We see a rise of 20 balloons and 5 columns, this will give us the following results from the spreadsheet: