Freeware Quick 15% window calculator

Freeware SANS10400XA - Quick 15% window calculator, with golden ratio window sizes. Download ...

It is easy to find the 15% of the floor area, and it is easy to find the square root of the allowable area , but that gives you square windows. All the methods to create "Golden Ratio" windows are not created to match a fixed area, so as a result all this calculations are stunting the design juices.

Never fear the Quick 15% will give you as many golden ratio windows as you want all within the 15% rule, you can even adjust the width or height and the other will counter to still give the 15%.