Kai Roofing Calculator

Calculate the surface area of your roof

Success!

Roof area calculator Cross Hipped

No pitch required
Roof calculator - Cross Hipped
* 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:

L1
L2
l1
C1
C2
H
* L is the length of the roof
* l is the width of the roof
* H is the rise (height) of the roof (3D image)
* C is the ridge length of the roof
* For decimal dimensions, use the dot notation! (.)

Total Roof area:

...

Roof Lengths

BH = EH = ...
AG = FG = ...
CI = DI = ...
AB = ...
BC = ...
AF = CD = ...
DE = ...
EF = ...
GH = ...
HI = ...
roof

Roof Surfaces

ABHG = ...
BCIH = ...
DEHI = ...
EFGH = ...
AGH = ...
CDI = ...

Roof Slopes

ABIHF = BCIH = DEHI = EFGH
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
AGF
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
AGH
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
Roof calculator - Cross Hipped
* 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:

L1
L2
l1
C1
C2
H
Small dormer:
Lu 0
Lu 1
h
* L is the length of the roof
* l is the width of the roof
* H is the rise (height) of the roof (3D image)
* C is the ridge length of the roof
* For decimal dimensions, use the dot notation! (.)

Total Roof area:

...

Roof Lengths

BH = EH = ...
AG = FG = ...
CI = DI = ...
AB = ...
BC = ...
AF = CD = ...
DE = ...
EF = ...
GH = ...
HI = ...
roof

Roof Surfaces

ABHG = ...
BCIH = ...
DEHI = ...
EFGH = ...
AGH = ...
CDI = ...

Roof Slopes

ABIHF = BCIH = DEHI = EFGH
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
AGF
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
AGH
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
Roof calculator - Cross Hipped
* 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:

L1
L2
l1
C1
C2
H
Large dormer:
Lu 0
Lu 1
Lu 2
h
* L is the length of the roof
* l is the width of the roof
* H is the rise (height) of the roof (3D image)
* C is the ridge length of the roof
* For decimal dimensions, use the dot notation! (.)

Total Roof area:

...

Roof Lengths

BH = EH = ...
AG = FG = ...
CI = DI = ...
AB = ...
BC = ...
AF = CD = ...
DE = ...
EF = ...
GH = ...
HI = ...
roof

Roof Surfaces

ABHG = ...
BCIH = ...
DEHI = ...
EFGH = ...
AGH = ...
CDI = ...

Roof Slopes

ABIHF = BCIH = DEHI = EFGH
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
AGF
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
AGH
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
Roof calculator - Cross Hipped
* 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:

L1
L2
l1
C1
C2
H
Small dormer:
Lu 0
Lu 1
h
Small dormer 2:
Lu 3
Lu 4
h 2
* L is the length of the roof
* l is the width of the roof
* H is the rise (height) of the roof (3D image)
* C is the ridge length of the roof
* For decimal dimensions, use the dot notation! (.)

Total Roof area:

...

Roof Lengths

BH = EH = ...
AG = FG = ...
CI = DI = ...
AB = ...
BC = ...
AF = CD = ...
DE = ...
EF = ...
GH = ...
HI = ...
roof

Roof Surfaces

ABHG = ...
BCIH = ...
DEHI = ...
EFGH = ...
AGH = ...
CDI = ...

Roof Slopes

ABIHF = BCIH = DEHI = EFGH
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
AGF
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
AGH
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
Roof calculator - Cross Hipped
* 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:

L1
L2
l1
C1
C2
H
Large dormer:
Lu 0
Lu 1
Lu 2
h
Large dormer 2:
Lu 4
Lu 5
Lu 6
h 2
* L is the length of the roof
* l is the width of the roof
* H is the rise (height) of the roof (3D image)
* C is the ridge length of the roof
* For decimal dimensions, use the dot notation! (.)

Total Roof area:

...

Roof Lengths

BH = EH = ...
AG = FG = ...
CI = DI = ...
AB = ...
BC = ...
AF = CD = ...
DE = ...
EF = ...
GH = ...
HI = ...
roof

Roof Surfaces

ABHG = ...
BCIH = ...
DEHI = ...
EFGH = ...
AGH = ...
CDI = ...

Roof Slopes

ABIHF = BCIH = DEHI = EFGH
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
AGF
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
AGH
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
Roof calculator - Cross Hipped
* 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:

L1
L2
l1
C1
C2
H
Large dormer:
Lu 0
Lu 1
Lu 2
h
Small dormer:
Lu 4
Lu 5
h 2
* L is the length of the roof
* l is the width of the roof
* H is the rise (height) of the roof (3D image)
* C is the ridge length of the roof
* For decimal dimensions, use the dot notation! (.)

Total Roof area:

...

Roof Lengths

BH = EH = ...
AG = FG = ...
CI = DI = ...
AB = ...
BC = ...
AF = CD = ...
DE = ...
EF = ...
GH = ...
HI = ...
roof

Roof Surfaces

ABHG = ...
BCIH = ...
DEHI = ...
EFGH = ...
AGH = ...
CDI = ...

Roof Slopes

ABIHF = BCIH = DEHI = EFGH
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
AGF
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12
AGH
  • Slope Grade = ... %
  • Angle = ... deg
  • Pitch = ... x12

Comments:

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Thinking of buying or selling a house?
Consider the roof condition

Selling a house

Home buyers appreciate new roofs as they add value to the house. If you're thinking of selling your house and your roof is near the end of its life, a new roof could help you sell the house faster.

If the roof is in good condition and will last a decade or more, consider getting a roof inspection from a company to demonstrate its good condition. Such third-party evidence about the structure and structural value of the roof can help you attract strong offers.

In some cases, a new buyer might prefer replacing an old roof. Consider your home's overall situation. If you suspect buyers will tear down and renovate, it would be better to save the money. Your real estate agent can advise you on the best seller option.

Evaluating the roof when buying a house

When buying a house, you have a set budget. The last thing you need is an unexpected major expense for roof repairs. Never assume a roof is in excellent condition, even if it's free of mold or moss.

Always ask to see a roof inspection report from a specialized company. In some cases, you might be able to negotiate with the seller to make repairs or offer you a better price.

Roof assessment expert