Welcome to Gerard Roof Calculation!

Gerard Roofs

Click on NEW ROOF CALCULATION to start.

New Roof Calculation

To save your roof calculation you have to login to your account.

In case you are a new user, please register first.

Roof Calculator is a visual inspirational sales tool and calculator that lets professionals and customers calculate the amount of products needed for their roofs.


Dependent on the region default elements will be given for most important elements of the roof. This means that for each region default elements will be calculated automatically. If the user wants to change default items or add additional items then default option allows replacement.


Please note that this is an approximate estimation based on your given measurements and a mathematical formula. Before purchasing roofing materials for any project, please check amounts with your suppliers or contractors.