Square Footage Calculator
Free online Square Footage Calculator.
Calculator
How to Use
- Enter the required values
- Click Calculate to see the result
- Review the detailed output
Formula
Area = Length x Width (for rectangles). For irregular shapes, divide into rectangles, calculate each area, and sum. Total sq ft = sum of all room areas.
Example Calculations
Single Room
Input: Length: 15 ft, Width: 12 ft
Result: Area: 180 sq ft
Whole House
Input: Living: 18x14, Bedroom: 12x12, Kitchen: 14x10
Result: Total: 540 sq ft
L-Shaped Room
Input: Section A: 20x12, Section B: 10x8
Result: Total: 320 sq ft
About This Calculator
Free online square footage calculator. Calculate instantly in your browser with our easy-to-use tool. No sign-up required.
Our square footage calculator is free, easy to use, and provides instant results. All calculations are performed in your browser for privacy and speed.
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Frequently Asked Questions
Calculate square footage?
Rectangles: L x W. Irregular: divide into rectangles, calculate each, sum.
Measure house square footage?
Measure each room, calculate area, sum. Include only finished, heated/cooled space.
Sq ft to sq meters?
Multiply by 0.0929. 1,000 sq ft = ~93 sq meters.
Why accurate sq footage matters?
Affects property value, energy costs, material quantities, and taxes.
Sq footage for flooring?
Measure each room L x W for sq ft, add 10% for waste and cuts.