Shingle Calculator
Find how many bundles of shingles a roof needs. Enter the roof area from the roof area calculator, or from your plans, and the count follows.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
Shingles are sold in bundles, and a roofing square covers 100 square feet. Divide the roof area by 100 to get squares, add the allowance for cuts and waste, then multiply by the bundles per square.
Many shingles come three bundles to a square, but the number is printed on the wrapper, so check it there before you count.
Worked example
A roof of 1,800 ft², with an allowance for cuts and waste, comes to 19.8 squares, which is 60 bundles.
Questions
Is 10 percent waste enough?
For a simple gable roof many people allow about 10 percent. Roofs with many valleys, hips or dormers often need more.
What about starter strip and ridge caps?
They are sold separately from the field shingles. Count them with the supplier coverage figures for each product.
Does this check the roof load?
No. It only counts material. Roof loads are a job for a building professional.
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