‹ All calculators
Roofing Shingles
Roof squares, shingle bundles, underlayment, starter, ridge cap and drip edge from the footprint and pitch.
Enter the building footprint to see results.
Assumptions
- Simple gable geometry: surface = footprint (with overhang) × pitch factor. Hips, dormers and valleys add waste — use 15%.
- Three bundles per square for standard architectural shingles; starter ≈ 105 LF per bundle; ridge cap ≈ 33 LF per bundle.
Common questions
How many bundles of shingles per square?
Three bundles cover one square (100 SF) for most architectural and 3-tab shingles. Heavier designer shingles can take four or five.
Planning numbers. Confirm quantities with your supplier, spec and local conditions before ordering.
Running a crew?HardHatOps — toolbox talks, time clock, sign-off records, daily duties. The field side.
Bidding and running jobs?IAOIntel — takeoffs, estimates, daily logs, spec intelligence. The office side.