How is the area of a rectangle calculated?

Multiply the length by the width. A room measuring 10 ft by 12 ft has an area of 120 square feet. The area calculator applies the correct formula for whichever shape you select.

How is the area of a circle calculated?

The area of a circle is π × r², where r is the radius. A circle with a radius of 5 units has an area of approximately 78.54 square units because 3.14159 × 5 × 5 = 78.54.

How is the area of a triangle calculated?

Multiply the base by the height and divide by 2. The formula is A = (base × height) / 2. A triangle with a base of 8 and height of 6 has an area of 24 square units.

What is the difference between area and perimeter?

Area measures the 2D space inside a shape (in square units), while perimeter measures the total distance around its boundary (in linear units). Both are commonly needed for flooring and fencing projects.

How do I convert area between square feet and square meters?

One square meter equals approximately 10.764 square feet. Multiply square meters by 10.764 to get square feet, or divide square feet by 10.764 to get square meters.

Area Calculator

Calculate the area of any common shape in seconds. Pick a shape — square, rectangle, triangle, circle, parallelogram, or trapezoid — enter its dimensions, and the area calculator applies the correct formula for you.

Shape

Side

How to Use the Area Calculator

Pick your shape.
Enter the dimensions for that shape.
Click Calculate to see the area in square units.

Formulas Used

Square: s² Rectangle: L×W Triangle: ½bh Circle: πr² Parallelogram: bh Trapezoid: ½(a+b)h

Example: A circle with radius 5 has area ≈ 78.54 square units.

Frequently asked questions

Everything you need to know about this calculator.

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How to Use the Area Calculator

Formulas Used

Frequently asked questions

How is the area of a rectangle calculated?

How is the area of a circle calculated?

How is the area of a triangle calculated?

What is the difference between area and perimeter?

How do I convert area between square feet and square meters?

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