Area Calculator
Calculate area of common shapes from dimensions
Find the area of common shapes — rectangle, square, triangle, circle, and trapezoid — from their dimensions. Pick a shape, enter the measurements, and get the area.
Calculate the area of common shapes from their dimensions. This computes area — it does not convert units.
Area
50
square units
How to Use This Calculator
- Choose the shape from the dropdown.
- Enter the dimensions the shape needs (for example, length and width for a rectangle).
- Read the area.
Why Use This Calculator?
- Estimating floor, wall, or land area before buying materials.
- Checking geometry work.
- Comparing the area of two differently shaped spaces.
Real-World Examples
Rectangle 10 × 5
Area is 10 × 5 = 50 square units.
Circle with radius 5
Area is π × 5² ≈ 78.54 square units.
The shape formulas
Rectangle is length × width; triangle is ½ × base × height; circle is π × radius²; trapezoid is ½ × (base1 + base2) × height. The calculator applies the right one for your chosen shape.
Frequently Asked Questions
What units is the answer in?
Whatever you enter. If your dimensions are in feet, the area is in square feet. The calculator doesn't convert units.
How do I find the area of an irregular shape?
Break it into simpler shapes (rectangles and triangles), find each area, and add them up.
Why does the circle use the radius?
The standard circle-area formula uses the radius. If you only know the diameter, halve it first.
Important Disclaimer
Computes area from the dimensions you enter; it does not convert between units.
Privacy
Your entries stay in your browser and aren't stored or transmitted.
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