Construction Calculators

Flooring Calculator

Calculate the square footage of a room and how many boxes of flooring to buy, including a waste allowance.

Room area —

Area including waste —

Boxes needed —

About the Flooring Calculator

This calculator finds the square footage of a room and how many boxes of flooring (laminate, vinyl plank, hardwood or tile) you need to buy, including extra material for cuts and mistakes.

Formula: Room Area = Length × Width; Area with Waste = Room Area × (1 + Waste %); Boxes Needed = Area with Waste ÷ Coverage per Box

A 10% waste allowance is standard for straight-laid floors; bump it up to 15% for diagonal layouts or rooms with lots of corners and closets.