Insulation Calculator | Free Insulation Calculator Square Feet - Insulation Estimator

Manually Calculate or use Calculator

If you want the exact building square footage, manually calculate the "roof" and "walls" with our guides. The calculator overestimates the building's square footage to ensure you have extra insulation delivered.

40' (Width) x 60' (Length) w/2:12 Root Pitch*

Calculate Roof Square Footage.

40' x 60' = 2,400 sq. ft. x 1.014* = 2, 433 sq. ft.

Roof Pitch Slope Multipliers:

1:12 = 1.003 | 2:12 = 1.014* | 3:12 = 1.031 | 4:12 |= 1.054 | 5:12 = 1.083 | 6:12 = 1.118 |

Example 40' (Wide) x 60' (Long) x 14 (Height)

Calculate Wall Square Footage

End Walls: Multiply the width by the height, and double it for both ends:

End Wall Area=2×(40×14) = 1,120 sq. ft.

Side Walls: Multiply the length by the height, and double it for both sides:

Side Wall Area=2×(60×14) =1,680 sq. ft.

Total Wall Area=1,120 (EW) + 1,680 ( SW) = 2,800 sq. ft.