SquareFtCalc
✓ Free square footage calculator

Calculate square footage in seconds.

Measure one room or a whole project. Add waste allowance and cost per square foot to get the number you actually need.

Your measurements

Add as many rooms or areas as you need.
Room
ft
ft
$

More calculators for your project

Square footage is usually only the first question. These are the natural next tools for SquareFtCalc.

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Roof Area CalculatorEstimate roof square footage and material allowance.

How to calculate square feet

For a rectangular room, multiply the length by the width. We do the rest automatically, including multiple rooms and waste.

1
Measure the length

Measure the longest side of the room or area in feet.

2
Measure the width

Measure the other side using the same unit.

3
Multiply them

A 12 ft × 10 ft room is 120 square feet.