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Free Roofing Estimate Calculator

Turn a roof footprint and pitch into squares, then into a price that covers your overhead and hits your target profit margin. Free, no signup, nothing saved.

1. The roof

Footprint area (sq ft)Plan view, as measured from the ground or satellite

Pitch (rise per 12)e.g. 6 for a 6/12 roof

Waste factor (%)Simple gable ~10%, cut-up hip roofs more

Layers to tear off0 for a new deck

2. Your costs

Material cost per square ($)All materials per square, from your supplier

Install labor per square ($)What install costs YOU

Tear-off labor per square, per layer ($)

Dumpster, permit, delivery ($)Flat costs for the whole job

3. Your business

Overhead (% of job cost)Insurance, trucks, office, marketing

Target net profit margin (%)Share of the sale price you keep

Compare: your usual markup (%)If you normally “add X%” to cost

Starting numbers are examples only. Replace them with your own.

Your price

Pitch factor-

Roof squares (no waste)-

Squares to order (with waste)-

Direct job cost-

Overhead-

Break-even-

Price to customer-

Price per square-

Net profit-

Versus your usual markup

Price with markup-

Net profit after overhead-

Actual net margin-

Price to customer-

Want this for every job, with a customer quote?

The full pack does this line by line with your real supplier prices, prints a quote that hides your costs, and tracks what you actually spent.

Get the pack — $29

Or get the free markup vs margin cheat sheet (PDF).

How this calculator works

Pitch factor = √(1 + (rise ÷ 12)²). A 6/12 roof has 11.8% more surface than its footprint.
Squares = footprint × pitch factor ÷ 100. Squares to order adds your waste factor.
Direct cost = materials on ordered squares + install labor on actual squares + tear-off per layer + flat costs.
Break-even = direct cost + overhead.
Price = break-even ÷ (1 − target margin), rounded up to the nearest $10.

Step 5 is the part most pricing methods get wrong. Read why markup and margin are different, or see how to price a roof per square.