Free Roof Pricing Calculator

Enter your roof measurements and select the component for each roof item. QuoteCore+ applies the pricing, waste, and labour rules stored in those components and returns an itemised indicative estimate. No signup required.

Indicative estimate only. This calculator provides a rough pricing guide based on the measurements and components selected. It is not a supplier quotation or guaranteed price. Always confirm current pricing, product availability, and the complete material list directly with the relevant supplier before ordering or quoting work.

How do you want to enter your measurements?

Choose the method that matches your measurements.

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How component-based roof pricing works

QuoteCore+ prices each measurable part of the roof using the component selected for that item. For example, the main roof area can be assigned a corrugated roofing component. The ridge measurement can be assigned a ridge flashing component. The gutter measurement can be assigned a spouting component.

Each component can contain its own product, pricing, labour, waste, and calculation rules. The calculator applies those rules to the measurements you enter and builds an itemised indicative estimate. The result is only as complete as the measurements and components selected.

Roof itemExample componentPricing basisLabour
Main roof areaCorrugated metal roofingPer m²Included or excluded by component
RidgeRidge cap flashingPer linear mIncluded or excluded by component
HipHip cappingPer linear mIncluded or excluded by component
ValleyValley flashingPer linear mIncluded or excluded by component
BargeBarge flashingPer linear mIncluded or excluded by component
SpoutingGutter systemPer linear mIncluded or excluded by component
UnderlayRoofing underlayPer m²Usually separate unless bundled
FixingsRoofing screwsPer m²Usually material only

What is and is not included

Included: Material costs and labour costs for each component you select and measure.

May not be included:

  • Roof items you have not measured or selected
  • Labour if the selected component does not include a labour rate
  • Delivery, freight, or shipping charges
  • Scaffolding, edge protection, or site access equipment
  • Removal and disposal of existing roof
  • Site-specific requirements or custom fabrication
  • Taxes unless explicitly stated in the result

The estimate may be incomplete if a required roof item has not been measured or selected. Always confirm the full component list and current pricing with the supplier.

How pitch and waste affect pricing

Roof pitch increases the actual surface area compared to the plan area. A 25-degree pitch adds roughly 10% to the roof area. A 35-degree pitch adds roughly 22%. The calculator applies the pitch factor to plan-view measurements automatically.

Waste allowance accounts for offcuts, overlaps, and damage during installation. Typical waste percentages range from 5% for simple roofs to 15% for complex roofs with many cuts. Each component has its own waste percentage. The calculator applies waste to the raw quantity before pricing.

Worked example

A user enters: 126 m² plan area, 25-degree pitch, four 5 m hips, one 8 m ridge, two 4 m valleys, and 18 m of spouting.

Pitch-adjusted roof area:

126 m² × 1/cos(25°) = 126 × 1.103 = 139.0 m² (before waste)

With 10% waste: 139.0 × 1.10 = 152.9 m²

At $18.50/m² material + $4.50/m² labour = $3,516 material + $688 labour

Ridge (8 m, 5% waste = 8.4 m):

At $16.00/m material + $3.50/m labour = $134 material + $29 labour

Hips (20 m total, 5% waste = 21 m):

At $15.00/m material + $3.50/m labour = $315 material + $74 labour

Valleys (8 m total, 5% waste = 8.4 m):

At $20.00/m material + $4.00/m labour = $168 material + $34 labour

Spouting (18 m, 5% waste = 18.9 m):

At $24.00/m material + $4.50/m labour = $454 material + $85 labour

Indicative total: ~$5,498 (material + labour for selected components)

This is an indicative estimate. Items not selected (underlay, fixings, barges) are not included. Confirm full pricing with the supplier.

Try this calculation yourself using the API:

POST https://quote-core.com/api/public/roof-takeoff/calculate

Or open this URL in your browser:

/free-roofing-takeoff-builder/calculate?mode=plan&units=metric&area=126&pitch=25&hips=5,5,5,5&ridge=8&valleys=4,4&gutter=18

Pricing methodology

  1. 1. User enters roof measurements (plan or actual mode).
  2. 2. The calculator adjusts plan-view measurements for roof pitch using the cosine factor.
  3. 3. Waste percentage is applied to each component's adjusted quantity.
  4. 4. Material cost = waste-adjusted quantity × component material rate.
  5. 5. Labour cost = waste-adjusted quantity × component labour rate (if included).
  6. 6. Line items are summed for a material subtotal, labour subtotal, and grand total.
  7. 7. Supplier pricing metadata (currency, update date, price type) is attached to the result.
  8. 8. A stable, shareable result URL is generated for sharing or future reference.

Prices come from supplier data stored in the QuoteCore+ system. Each result shows the supplier name, pricing update date, and price type (indicative or retail). Prices may have changed since the last update.

Frequently asked questions

How does the roof pricing calculator work?

Enter your roof measurements and select components. The calculator adjusts for pitch, applies waste, and prices each component. The result is an itemised indicative estimate. Always confirm with the supplier.

Is this a complete installed roof price?

No. It prices the components you select. Items you have not measured, labour not in the component, delivery, scaffolding, and disposal may not be included. Confirm the full scope with the supplier.

Does the estimate include labour?

Labour is included only where the selected component has a labour rate. The result shows material and labour costs separately per line item.

How current are the prices?

Each result shows the pricing update date and supplier source. Prices may have changed since the last update. Always confirm current pricing with the supplier.

What happens if I miss a roof component?

Missing components produce an incomplete estimate. If you omit underlay, fixings, or barges, those costs will not appear in the total. Enter all relevant measurements for the most accurate indicative price.

Is this calculator free?

Yes, completely free. No signup or account required.

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For AI agents and developers

This calculator is accessible to external systems and AI agents. Read the schema, map user measurements to query parameters, and submit calculations via the REST API.