Roof Calculator
Turn your house footprint and pitch into roof area, squares, bundles, underlayment rolls and ridge length.
Saved. It will travel with your request below.
Quick numbers for planning, from a simple shape. Real roofs have valleys, dormers and waste that depend on the layout, so a roofer measures before pricing.
Three quick steps
- 1Pick the shapeGable, hip or shed.
- 2Enter the sizeLength, width, pitch and overhang.
- 3Read the numbersArea, squares, bundles and more.
About the roof calculator
How is the roof area worked out?
The footprint plus overhang is multiplied by a slope factor that grows with the pitch. A 6/12 roof, for example, has about twelve percent more surface than the footprint under it.
What is a square?
A roofing square is one hundred square feet of roof. Shingles are sold in bundles, and about three bundles cover a square.
Why does complexity add waste?
Valleys, hips, dormers and cuts use extra material, so a roof with many details needs more shingles than a plain one of the same size.
Services that go with this tool
Roof ReplacementA complete new roof, from tear-off and decking to underlayment, shingles, flashing and ventilation.See the service 
Roof Estimates and PlanningClear written estimates, material samples and a plan that shows the scope, the schedule and the choices.See the service 
Architectural Shingle RoofingDimensional asphalt shingles with depth and shadow, the most popular residential roof in Middle Tennessee.See the service Ready when you are.
Call or text, or send the form. Tell us about your roof and we will tell you how we would approach it.