Roofing Squares Calculator
A roofing square is 100 square feet of roof surface. Enter your home's footprint and roof pitch to estimate how many squares of shingles you need, including waste.
Result
- Roof surface area
- Squares before waste
- Squares to order
- Shingle bundles
Results are rounded for ordering. Check product labels for exact coverage.
How to use this
The pitch multiplier converts flat footprint into sloped surface area. A 6/12 roof has about 12% more surface than its footprint; a 12/12 roof has about 41% more.
Complex roofs with many valleys and dormers need 15% or more waste; simple gable roofs can use 10%.
Ready to price the job? Try the Roof Replacement cost calculator for installed prices with materials and labor.
Common questions
What is a roofing square?
One square equals 100 square feet of roof surface. Roofers price materials and labor per square.
How many bundles of shingles are in a square?
Most architectural shingles come three bundles per square. Some heavier products need four.
How do I find my roof pitch?
Measure how many inches the roof rises over 12 inches of horizontal run, from inside the attic or with a level on the roof.