Roofing Calculator
Estimate roofing materials — shingles, underlayment, and ridge cap — for any roof.
Roofing Calculator
Estimate roofing materials — shingles, underlayment, and ridge cap — for any roof.
Engineering Calculation
ℹ️ Used for basic engineering ratio and product calculations
Disclaimer
Results provided by this calculator are for informational and educational purposes only. They are based on the values you enter and standard formulas, and should not be considered financial, medical, legal, or professional advice. Always consult a qualified professional before making important decisions based on these results. Roughtools makes no warranties regarding the accuracy or completeness of these calculations for your specific situation.
Frequently Asked Questions
Pro Tips
Always verify critical calculations with a second method or source — for important decisions, this tool provides a starting point, not a final answer.
Input accuracy determines output accuracy. Use precise values rather than rough estimates for the most useful results.
Run the calculation multiple times with slightly different inputs to understand the sensitivity of the result to your assumptions.
For professional, financial, medical, or legal decisions, always confirm results with a qualified professional before acting.
When to Use This Calculator
Use the Roofing Calculator for fast, accurate calculations without installing any software.
Understand the formula and see how changing inputs affects the result for educational purposes.
Get a quick estimate before performing more detailed analysis or consulting a professional.
Accessible from any device — no app to install, no account required, works offline after loading.
Run multiple scenarios quickly by changing one input at a time to understand sensitivities.
About the Roofing Calculator
This roofing calculator estimates the total roofing material needed for any residential roof — shingles in squares and bundles, underlayment, ridge cap, drip edge, and starter strips — based on the house footprint, roof pitch (slope), and number of roof facets. Enter floor plan dimensions and roof pitch to see total roof area, squares (1 square = 100 sq ft), and material quantities with a 10–15% waste factor. Built for homeowners getting roofing bids and contractors estimating material costs.
How to Use the Roofing Calculator
- 1
Enter the footprint dimensions of your house (length × width in feet).
- 2
Select the number of roof sections (gable, hip, complex) and enter dimensions for each.
- 3
Enter the roof pitch (rise over run, e.g. 6/12 for a 6-inch rise per 12-inch run).
- 4
Select roofing material: asphalt shingles, metal panels, or tiles.
- 5
See total squares, bundles of shingles, underlayment rolls, and linear feet of ridge cap.
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