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Calculate the surface area of your roof

Roof area calculator

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Gable

No pitch required (how )
Roof calculator - Gable
* This image is to clarify which is the rise of the roof (H) and the rise of the dormer (h). The image is for general informational purpose.
3D

Your roof dimensions:

L
l
H
Total Roof area: ...
Roof Lengths
Roof Surfaces
Roof Slopes
- L is the length of the roof
- l is the width of the roof
- H is the rise (height) of the roof (3D image)
- For decimal dimensions, use the dot notation! (.)
Roof calculator - Gable
* This image is to clarify which is the rise of the roof (H) and the rise of the dormer (h). The image is for general informational purpose.
3D

Your roof dimensions:

L
l
H
Small dormer:
Lu 0
Lu 1
h
Total Roof area: ...
Roof Lengths
Roof Surfaces
Roof Slopes
- L is the length of the roof
- l is the width of the roof
- H is the rise (height) of the roof (3D image)
- For decimal dimensions, use the dot notation! (.)
Roof calculator - Gable
* This image is to clarify which is the rise of the roof (H) and the rise of the dormer (h). The image is for general informational purpose.
3D

Your roof dimensions:

L
l
H
Large dormer:
Lu 0
Lu 1
Lu 2
h
Total Roof area: ...
Roof Lengths
Roof Surfaces
Roof Slopes
- L is the length of the roof
- l is the width of the roof
- H is the rise (height) of the roof (3D image)
- For decimal dimensions, use the dot notation! (.)
Roof calculator - Gable
* This image is to clarify which is the rise of the roof (H) and the rise of the dormer (h). The image is for general informational purpose.
3D

Your roof dimensions:

L
l
H
Small dormer:
Lu 0
Lu 1
h
Small dormer 2:
Lu 3
Lu 4
h 2
Total Roof area: ...
Roof Lengths
Roof Surfaces
Roof Slopes
- L is the length of the roof
- l is the width of the roof
- H is the rise (height) of the roof (3D image)
- For decimal dimensions, use the dot notation! (.)
Roof calculator - Gable
* This image is to clarify which is the rise of the roof (H) and the rise of the dormer (h). The image is for general informational purpose.
3D

Your roof dimensions:

L
l
H
Large dormer:
Lu 0
Lu 1
Lu 2
h
Large dormer 2:
Lu 4
Lu 5
Lu 6
h 2
Total Roof area: ...
Roof Lengths
Roof Surfaces
Roof Slopes
- L is the length of the roof
- l is the width of the roof
- H is the rise (height) of the roof (3D image)
- For decimal dimensions, use the dot notation! (.)
Roof calculator - Gable
* This image is to clarify which is the rise of the roof (H) and the rise of the dormer (h). The image is for general informational purpose.
3D

Your roof dimensions:

L
l
H
Large dormer:
Lu 0
Lu 1
Lu 2
h
Small dormer:
Lu 4
Lu 5
h 2
Total Roof area: ...
Roof Lengths
Roof Surfaces
Roof Slopes
- L is the length of the roof
- l is the width of the roof
- H is the rise (height) of the roof (3D image)
- For decimal dimensions, use the dot notation! (.)

Comments:

#

How do we calculate the surface area of the roof?

We calculate the roof area by splitting it into geometric shapes, we determine the surface area of each individual shape and then we add them up together.

Some roofing calculators use Pitch and House Area but unfortunately, this approach is not the most precise way to get the roof area because you cannot use it for more roof shapes.

Other roofing calculators ask for a lot of dimensions in order to determine a more precise total roof area.

Our approach is to try and determine a pretty precise roof area by asking only for the minimal dimensions. We determine the other dimensions from the ones you provide by doing mathematical calculations in the background.

Happy roofing worker
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