Square Footage Calculator
Calculate rectangular area for quick planning and material estimates.
Step 1: Units
Step 2
Enter project measurements
Use decimals if needed (e.g. 3.5).
How to use this calculator
Enter length and width to get total area.
What the math is doing
Square footage = length × width when both are in feet.
Frequently asked questions
Gross living area?
Follow MLS rules beyond this simple rectangle.
Odd floor plans?
Approximate with multiple rectangles.
Garage slabs?
Include only conditioned space if required for your use case.
Metric listings?
Use m² line in the results.