Square Footage Calculator

Measure rooms and plan whole-box flooring purchases.Square Footage Calculator is a free browser tool for DIY room measurement and flooring purchase planning. Enter feet and inches or metric dimensions, calculate rectangles, L-shaped rooms, circles and triangles, add or subtract rectangular sections, and combine up to 20 rooms. The flooring calculator separates net area, waste allowance, whole-box rounding, spare boxes and optional costs. Copy or print results without an account; measurements stay in the current tab and are lost on refresh. Use the result as a planning estimate and follow product instructions before ordering.