Window Rough Opening Size Calculator
Calculate window rough opening dimensions with 0.5" allowance.
Rough Opening
37 × 49 in
Window Size
36 × 48 in
Width Allowance
0.5 in each side
Height Allowance
0.5 in top + bottom
Calculate window rough opening dimensions with 0.5" allowance.
Rough Opening
37 × 49 in
Window Size
36 × 48 in
Width Allowance
0.5 in each side
Height Allowance
0.5 in top + bottom