How to use the calculator

1. Select Units - choose the units you have measured your windows in from either Inches to CM.

2. Enter Sizes's - This is the amount of different sizes you have of windows for example you might have 10 windows at 100cmx100cm and 2 at 120cmx120cm. Even though there is 12 windows in total there is only 2 sizes so you would enter 2. Do this and press submit now a new section will appear.

3. Enter Full Measurements - In this section you enter the width and height of your windows. You then also enter the quantity you have. After this press submit and it will give you a total SQM.