Flooring Calculator
Estimate how much flooring material you need for a room and what it will cost. Enter the room dimensions (or the total area), the waste allowance and the price per square foot or square metre — the calculator does the rest.
Enter room dimensions
Enter room details, then press Calculate.
Flooring quantity formula
Area to cover = room area × (1 + waste / 100)
Total cost = Area to cover × price per unit area
Typical waste allowances: 5% for straight-lay laminate or vinyl planks in a simple room; 10% for most rooms; 15% for diagonal or herringbone patterns.
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Frequently asked questions
Yes — you always need at least 5%. Even in a simple rectangular room, cuts at the edges, defects and future repairs require spare material. For complex patterns or rooms with many corners, use 15%.
Divide the box price by the square footage the box covers. For example, if a box costs £45 and covers 20 ft², enter 45 ÷ 20 = 2.25 as the price per square foot.