Roof tile calculator
Estimate developed roof area from building footprint and pitch, then calculate roof tiles and packs with a cutting and breakage allowance.
- 100% local
- Instant
- Free
- No account
- Works offline
Roof tile quantities
Enter the building footprint, pitch and tile coverage. The calculator corrects horizontal area for the roof slope.
Why use this tool?
Roof tile calculator helps turn project measurements into a practical planning estimate. It uses the values entered in the form to calculate the relevant geometry, material quantity or purchasing units while keeping the assumptions visible and adjustable.
100% local and secure
Your data stays on your device and is never sent to our servers.
Smart processing
Generate, convert, or validate technical data with purpose-built controls.
Supported formats
Technical formats and syntaxes suited to each generator, converter, or validator.
Save time
Get a clean, ready-to-use result in seconds without installing software or configuring a complex workflow.
Fonctionnement
How does this tool work?
The calculator starts from the project measurements you enter and applies the relevant geometry or material formula transparently. Intermediate values are kept visible so you can understand how the final estimate is obtained rather than relying on an unexplained result.
Editable technical assumptions such as product dimensions, spacing, coverage, pack size or waste allowance should be replaced with the values for the material actually selected. This makes the estimate useful for comparing options before purchasing.
The result is intended for planning quantities and checking dimensions. It does not replace structural design, installation instructions or local regulations, so critical values should always be checked against manufacturer documentation and project requirements.
Use cases
Prepare a material estimate
Turn measured project dimensions into practical quantities before ordering or visiting a supplier.
Compare construction options
Change dimensions, product sizes and allowances to see how different choices affect the estimate.
Check a manual estimate
Use the displayed intermediate values to compare the calculator with a hand calculation or quotation.
Guide
How to use this tool
- 1
Measure the project
Enter the actual dimensions and subtract or include openings where the tool provides that option.
- 2
Set product assumptions
Adjust dimensions, spacing, coverage, packaging and allowances to match the selected material.
- 3
Review the result
Check intermediate values and round purchasing quantities according to the supplier’s packaging.
Tips and best practices
- Use finished, measured dimensions whenever possible instead of relying only on nominal plans.
- Replace default product values with the exact specifications supplied by the manufacturer.
- Keep a reasonable allowance for cutting, breakage or site conditions, but avoid inflating it without a project-specific reason.
Frequently asked questions
Is the result a final order quantity?
It is a planning estimate based on the values entered. Check packaging, installation rules, site losses and supplier information before placing a final order.
Can I change the default assumptions?
Yes. The editable technical fields are intended to be replaced with the dimensions, coverage or packaging of the product you actually plan to use.
Does the calculator verify building regulations?
No. It performs quantity or geometry calculations only. Structural, safety and regulatory requirements must be checked separately for the real project.
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