Formula used
Units = ceil([project area ÷ coverage per unit] × [1 + waste ÷ 100])
Worked flooring example
Flooring Calculator example: 347 ft² × 1.1 = 381.7 ft² of order coverage. Dividing by 23 ft² per unit gives 16.6 units, so the purchase quantity is 17 whole units.
Package rounding and usable yield
Round to whole cartons and compare the post-rounding coverage with the waste-adjusted area rather than rounding square feet alone.
Use carton coverage for the selected SKU
Enter the square-foot coverage printed for the exact carton, not a generic plank or tile size. Pattern direction, diagonal layouts, room transitions, closets, damaged pieces, and minimum usable offcut length affect allowance. Keep different colors, batches, plank sizes, and installation areas separate so whole-carton rounding is applied to the right product.
Why the label value may not match the floor or wall
Plank direction, stagger rules, pattern repeat, closets, transitions, damaged boards, and minimum carton sales affect the order.
Questions specific to this calculation
What usable coverage should I enter for flooring?
Measure each room at its widest practical boundaries and subtract only areas that truly will not receive flooring; enter the carton coverage from the product label.