Flooring and Tile Calculator (Waste and Packs)

Net area is length × width. Order area adds waste: 8–10% for straight-laid planks, often 10–15% for tile, 15–20% for diagonal or herringbone layouts. Packs = order area ÷ pack coverage, rounded up.

Inputs

Units

Results

Net area: 192.00ft²
Area to buy: 211.20ft²
Packs: 11

The Result is indicative and educational. It does not constitute a design, a technical opinion or medical advice and does not replace calculations or verification by a person with the appropriate qualifications and authorisations. Before purchase, installation or use in practice – in particular in electrical installations – the Result should be verified by a qualified specialist. Details: Terms of Service, point 4.

Example products

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Calculation method

A 16×12 ft room is 192 ft². Ten percent waste makes 211.2 ft². At 20 ft² per pack that is 10.56, so 11 packs. In metric mode the room and the box rating are both metric: a 4 × 3 m room is 12 m², 10% waste makes 13.2 m², and 2.2 m² packs need exactly 6.

Exact formula

Waste is a percent of net area. Pack coverage is the area printed on the box, in ft² or m².

Batches

Order every pack in one purchase and check that the boxes share a batch (lot) number. Tile or wood from a later batch can differ in shade.

Frequently asked questions

How much waste for tile vs laminate?

Straight-laid laminate or wood 8–10%. Tile 10–15%. Diagonal layouts and herringbone 15–20%; large tiles and rooms with many corners need more too.

Do I subtract the island?

This rectangle is the full floor. Subtract a cabinet footprint yourself if you will not lay flooring under it.

Stairs?

Use the stair calculator for rise and run, then add the tread and riser area separately. This tool covers rectangular rooms.

What about an L-shaped room?

Split it into rectangles, add up their areas to buy, divide the total by the pack coverage and round up once. Rounding each part separately can add a pack per part.