Roofing bundle calculator
Example: 24 squares ≈ 2,400 sq ft of roof.
Starter presets: 10% low waste roof, 12–15% typical, 18%+ cut-up.
Many architectural lines use 3 bundles per square — verify yours.
Key takeaways
- Waste slider matches how crews talk on the job.
- Round-up on bundles avoids short loads mid-day.
- Transparent inputs so you can match any manufacturer sheet.
- Pairs with your own pitch and starter strip takeoff.
- All math stays in the browser.
Who built this
ContractorHQ is edited by Bernard Guido — 25+ years in trade operations and software. These utilities follow the same quality bar as our reviews: fast pages, honest disclosure, and tools that stay useful without selling your data.
Frequently asked questions
What is a roofing square?
In the U.S., one square is 100 square feet of roof surface (plan area plus slope effects are still on you to estimate or measure).
Why bundles per square is editable?
Different shingle lines publish different coverage. Three bundles per square is common for many architectural shingles, but always read the bundle label.
Does this include starter, ridge cap or underlayment?
No. It only multiplies squares (with waste) by bundles per square for field shingles. Add accessories separately.
Is this code-approved?
No compliance certification. It is a quick order-of-magnitude helper for trucks and quotes.