Math Calculator
Area Calculator
Calculate area for rectangles, squares, triangles, circles, and trapezoids.
⚠️ Please enter valid positive values.
Area
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Calculator guide
How this calculator works
How to use this calculator
Choose a shape, enter the required dimensions, then calculate the area.
Formula used
Rectangle area = length × width. Square area = side². Triangle area = 1/2 × base × height. Circle area = π × radius². Trapezoid area = ((base 1 + base 2) / 2) × height.
Example calculation
A rectangle with length 10 and width 5 has area 50 square units.
What the result means
Area measures the amount of two-dimensional space inside a shape.
Frequently asked questions
What units should I use?
Use the same unit for all dimensions. The answer will be in square units.
Can I calculate irregular shapes?
This calculator handles common basic shapes only.
Why does a circle use π?
π is the constant relationship used in circle formulas.