TrueBuildCost
  1. Calculators
  2. /
  3. Roofing Calculator

Exterior

Roofing Calculator

Calculate roof area, squares, and shingle bundles from footprint, pitch, and waste.

Roofing

Inputs

Enter your measurements

Change any field and the results update instantly. Use supplier specs when you have them.

Results

Material estimate

Planning quantity

0.00squares

45 shingle bundles at your bundle rate.

Footprint
1,200sq ft
Pitch factor
1.118
Roof area with waste
1,475.8sq ft
Squares
15
Bundles
45

Planning quantities only. Supplier packaging, local material moisture, compaction, and delivery minimums can change the final order.

Tips & notes

Before you order

Assumptions that most often change the final quantity in the field—so you order with clearer eyes.

Estimated material costs

Optional dollar totals use national planning defaults—or whatever price you enter. They are not ZIP-tuned, and they exclude delivery, tax, and labor. Treat them as a rough material check, then confirm with a local quote.

  1. 01

    Use roof footprint dimensions, then let pitch factor increase the actual roof surface.

  2. 02

    Add 10-15% waste for simple roofs and more for valleys, dormers, and cut-up designs.

  3. 03

    One roofing square equals 100 square feet.

  4. 04

    Architectural shingles commonly use three bundles per square.

Roofing Calculator FAQs

Related calculators

Keep planning nearby materials

Gutter

Gutter

Estimate gutter linear feet, downspouts, elbows, and end caps for a home roofline.

Lumber

Lumber

Estimate board feet for dimensional lumber or studs and plates for a framed wall.

Paint

Paint

Estimate gallons for room walls, ceilings, trim, doors, windows, coats, and texture waste.

TrueBuildCost

ZIP-tuned planning ranges for a full house build or a single remodel—made to clarify what’s involved before the first bid.

Start with your ZIPBrowse projects

New home

  • Estimate a full house
  • How estimates work
  • Land & build checklist
  • Cost by state
  • Top 20 places
  • Compare builds

Projects

  • Browse projects
  • How project estimates work
  • Remodel checklist
  • Remodel ROI

Tools

  • Material calculators
  • Projects
  • Remodel ROI

Company

  • About
  • Privacy
  • Terms

© 2026 True Build Cost·Planning ranges, not contractor bids

AboutPrivacyTerms