Square Footage Calculator
Calculate area for any shape in square feet, yards, meters, and acres. Perfect for home improvement projects.
Square Footage Calculator
Calculate area for rectangles, triangles, circles, and trapezoids
Formula
Area varies by shapeRectangle: L×W, Triangle: ½×B×H, Circle: π×r², Trapezoid: ½×(a+b)×h
How to Use
- 1Select shape — Choose rectangle, triangle, circle, or trapezoid.
- 2Enter dimensions — Input the required measurements for your selected shape.
- 3View results — See area in square feet, yards, meters, and acres.
Frequently Asked Questions
How do I calculate square footage?
For rectangles: length × width. For triangles: ½ × base × height. For circles: π × radius². Our calculator handles all formulas automatically.
How many square feet in a square yard?
There are 9 square feet in one square yard (3 feet × 3 feet = 9 sq ft).
How many square feet in an acre?
One acre equals 43,560 square feet. This is roughly the size of a football field.
How do I measure an irregular room?
Break the room into regular shapes (rectangles, triangles), calculate each area separately, then add them together.