Measure a rectangular room at its longest and widest points. For L-shaped floors or several rooms, split them into rectangles, add the areas, subtract permanent openings, and enter the resulting net area above.
Use the coverage printed on the carton or product sheet. The calculator adds your chosen waste allowance, then rounds up to whole packs so the shopping list matches sellable quantities.
Expansion gaps, underlay and installation limits vary by product. Do not deduct them automatically; follow the exact flooring manufacturer's guide.
Enter room length and width, or enter a known net area directly. Add the waste allowance and coverage printed on the pack. The calculator rounds up to whole packs and shows actual coverage and leftover material.