Square Footage Calculator
Calculate area for rectangles, triangles, circles, and trapezoids. Add multiple rooms.
Ad$
Enter cost per sq ft to estimate total project cost.
120 sq ft
ft
ft
Ad
Coursera Holi Offer
Build your AI fluency and get more done, faster. Get the AI skills employers are looking for and create 20+ solutions you can use at work, right away.
Start Learning
Total Area
120sq ft
11.15 sq meters
Documentation
How It Works
Select a shape for each room or area, enter the dimensions, and the calculator will compute the area in square feet and square meters. You can add multiple rooms to get a total.
Optionally enter a price per square foot to estimate project costs for flooring, painting, or other per-area materials.
Area Formulas
Rectangle: L × W
Triangle: ½ × B × H
Circle: π × r²
Trapezoid: ½ × (B₁ + B₂) × H
Last Updated: February 28, 2026
Frequently Asked Questions