Browse categories

Trade and Construction Calculators

Flooring and Tile Estimator

Use this flooring and tile estimator entirely in your browser.

ResultEstimated tiles: 123

Measured floor area: 20.00 m²

Area including 10.0% allowance: 22.00 m²

Each tile covers 0.1800 m²

Layout, cuts, pattern matching, breakage, spare stock, and pack sizes may require a different quantity.

Calculations happen locally in your browser.

How to use this calculator

  1. Enter the labelled values and review the live result.
  2. Review the live result and use Copy result when you need to share it.

How the calculation works

Floor area plus the selected allowance is divided by the area of one tile, and the count is rounded up.

Formula

Tiles = ceil((length × width × (1 + allowance ÷ 100)) ÷ tile area)

Step-by-step calculation

  1. Enter the labelled values and review the live result.
  2. Floor area plus the selected allowance is divided by the area of one tile, and the count is rounded up.
  3. Check the displayed result, then copy it if needed.

Worked example

A 5 m by 4 m floor using 600 mm by 300 mm tiles with 10% allowance requires 123 tiles.

Methodology and review

Who this is for

People estimating pieces for a rectangular floor.

Inputs and units

  • Room dimensions
  • Tile or board dimensions
  • Waste allowance

Method

Floor area is divided by one tile or board's face area, then the selected cutting allowance is added and rounded up to whole pieces.

Worked example

A 20 m² floor using 0.25 m² tiles needs 80 tiles before waste.

Assumptions

  • The floor is rectangular and product dimensions are nominal face dimensions.
  • The allowance covers a simple layout.

Common mistakes

  • Mixing millimetres and metres
  • Ignoring pattern and cuts

Limitations

  • Patterns, irregular edges, matching batches, breakage, and cartons affect ordering.
  • Confirm pack coverage and installer recommendations.

How this tool was checked

Tests verify unit conversion, area division, allowance, and whole-piece rounding.

Reference sources

Related tools

Calculation review: 21 August 2026. Published by Goldwave Dynamics Limited. This is an internal product review, not an independent certification.

Risk guidance

Area and whole-tile rounding

The floor area and allowance are divided by one tile's face area. The result rounds up to a whole tile, but does not account for how tiles are packed or sold.

Plan the actual layout

Room shape, pattern, grout lines, borders, cuts, matching batches, breakage, and spare stock affect ordering. Check the layout and supplier pack quantity.

Frequently asked questions

Does this tool send my inputs anywhere?

No. The interactive calculation runs in your browser and this site does not submit tool inputs to a backend.

How should I use the result?

Use it for early planning only. Verify measurements, definitions, current local requirements, and the complete design with the relevant authority and appropriately qualified professionals.

Related tools