Roofing · Practical guide

Как да използвате Roof Tile Calculator — roof tiles do I need?

Estimate field-tile quantity from actual roof surface area, manufacturer tiles-per-square-metre coverage and waste.

Checked 29 August 2026Clear inputs and assumptionsWorks on mobile
Method

Tile quantity = roof surface area × tiles per square metre × (1 + waste percentage), rounded up.

Estimate field-tile quantity from actual roof surface area, manufacturer tiles-per-square-metre coverage and waste. The linked Sellible tool keeps the fields, units and output together so the assumptions can be reviewed before the result is used.

  1. 1

    Calculate the sloping area of every roof plane.

  2. 2

    Use the exact gauge and coverage for the chosen tile.

  3. 3

    Apply job-specific waste and round to pack or pallet quantities.

Worked example

Example values and result

These values demonstrate the method; replace them with measurements, rates or file details that match the real task.

Roof surface
100 m²
Tile coverage
10 tiles/m²
Waste allowance
10%
Planning quantity
1,100 tiles
What the result means

The result covers field tiles only unless the selected product coverage states otherwise. Ridge, hip, verge, valley and ventilation units should be scheduled separately.

Use Roof Tile Calculator
Before you rely on it

Точност и практически насоки

  • Confirm minimum pitch, headlap and batten gauge.
  • Separate field, ridge, hip, verge and special tiles.
  • Check colour batches, pallet quantities and safe delivery position.
Avoid these

Common mistakes

  • Using floor area instead of roof surface area.
  • Applying a generic tiles-per-square-metre figure.
  • Forgetting cuts and breakage around hips, valleys and openings.
Straight answers

Често задавани въпроси

Is Roof Tile Calculator free?

Yes. This calculator or browser utility is free and does not use processing credits.

Can I use this guide and Roof Tile Calculator on a phone?

Yes. The guide, inputs, results and calls to action are responsive and keyboard accessible on current phones, tablets and desktop browsers.

Should I order or make a decision from the estimate alone?

No. Confirm minimum pitch, headlap and batten gauge. Separate field, ridge, hip, verge and special tiles. The calculation is a planning aid rather than professional or regulatory approval.

How should I check the result?

Keep the source values and units visible, compare the result with supplier or project information, and retain enough precision until the final purchasing or reporting step.