How to calculate square footage
Area = Length × Width × Count
Worked example. Total area: 168 sq ft.
Example inputs — Length: 14 ft; Width: 12 ft; Number of identical areas: 1; Price per sq ft (optional): $0.00. Starting values are illustrative.
From George Guju, founder of Calculyn · Educational calculator guidance, not professional advice.
How it works
Square footage is length times width in feet. For an L-shaped room, split it into rectangles, calculate each, and add them together.
Assumptions & limitations
- Results are rounded for display.
Formula and assumptions reviewed October 2026 by the Calculyn team. How we build our calculators
Frequently asked questions
How do I measure an odd-shaped room?
Divide it into rectangles, measure each one, and add the areas.
How much extra material should I buy?
Add about 10% for cuts and waste on flooring or tile.