Calculate the area in square feet for various shapes. Enter the dimensions for a rectangle, triangle, circle, or trapezoid to get the area in square feet, square yards, and square meters. Essential for estimating materials for flooring, painting, roofing, and landscaping.
Enter Your Measurements
Results
Area
300.00
sq ft
Area
33.33
sq yards
Area
27.87
sq meters
Area
0.0069
acres
Formula
How to Use This Calculator
How to Use
- 1
Select the shape: rectangle, triangle, circle, or trapezoid.
- 2
For rectangles: enter length and width. For triangles: enter base and height. For circles: enter diameter. For trapezoids: enter the two parallel sides and height.
- 3
Results show the area in multiple units.
Frequently Asked Questions
Frequently Asked Questions
How do I calculate square footage of a room?
How do I convert square feet to square yards?
How many square feet in an acre?
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About This Calculator
This calculator uses the formula: Rectangle: L × W | Triangle: (B × H) ÷ 2 | Circle: π × (D ÷ 2)² | Trapezoid: ((Side1 + Side2) ÷ 2) × H. All calculations follow industry-standard methods. Results are estimates — always verify with a licensed professional for structural or code-compliant work.
Built and maintained by the CalcSmart team. Last updated March 2026.
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<iframe src="https://calcsmart.io/embed/square-footage-calculator" width="100%" height="520" frameborder="0" style="border-radius:8px;border:1px solid #e5e7eb" title="Square Footage Calculator"></iframe>Free to embed. Attribution link included automatically.