What does this tool do?
Plank flooring is sold by the plank or carton, with each plank covering a known area. This calculator divides the room area plus cutting waste by the coverage of a single plank.
The Formula
Planks = ⌈Room area × (1 + Waste ÷ 100) ÷ Plank coverage⌉Frequently Asked Questions
How many planks for a 180 sq ft room?
A 4 × 0.5 ft plank covers 2 sq ft, so 180 sq ft plus 10% waste needs about 99 planks.
How much waste should I allow for plank flooring?
10% is standard, and 15% is wise for diagonal layouts or rooms with many doorways.