Home Renovation Math · Chapter 3

Waste, Packs & the Order

The waste factor is lumpy. Area, waste % and a pack's coverage in — whole packs out, never a fraction.

Home › Calculators › Waste, Packs & the Order

Skip capacity, optional

Enter the area to order from, a waste percentage and a pack's coverage, then press Calculate.
From the book — Chapter 3. Order area = area × (1 + waste%). Packs to buy = that, rounded UP to a whole pack — never down, and never left as a decimal.

Matches Chapter 3's flooring order (9.828 m², 10% waste, 1.824 m² packs = 6 packs) exactly. Everything stays in your browser — no sign-up, nothing stored.