Window to Wall Ratio Calculator

Calculate Window to Wall Ratio (WtWr)



Formula

The formula to calculate the Window to Wall Ratio is:

\[ WtWr = \frac{GWA}{GEWA} \]

Where:

What is a Window to Wall Ratio?

A window to wall ratio is a measure of the amount of window area there is on a building relative to the total amount of exterior wall area. The most efficient window to wall ratios are those of approximately 20% window to wall area.

Example Calculation

Let's assume the following values:

Using the formula to calculate the window to wall ratio:

\[ WtWr = \frac{100}{500} = 0.20 \]

The window to wall ratio is 0.20 or 20%.