How this calculator works
Hardwood boards vary in length, grade and usable yield. The waste allowance covers cuts, defects and layout selection as well as simple offcuts.
FormulaArea with waste \u00f7 carton coverage = cartons to buy
Worked example
A 200 sq ft room with 10% waste needs 220 sq ft. If each carton covers 18 sq ft, buy 13 cartons.