Area Calculator
Calculate the area of common geometric shapes including rectangles, squares, triangles, circles, trapezoids, and parallelograms.
Calculate area
Select a shape and enter its dimensions. The calculator will calculate the area and show the complete step-by-step calculation.
Your result
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| Shape | — |
| Unit | — |
| Dimensions | — |
| Area | — |
Step-by-step calculation
What is area?
Area is the amount of two-dimensional space covered by a shape or surface. It is measured in square units, such as square meters, square centimeters, or square feet.
Different geometric shapes use different formulas to calculate their area.
How is area calculated?
The area formula depends on the shape being measured. For example, the area of a rectangle is found by multiplying its length by its width, while the area of a circle is calculated using π multiplied by the square of its radius.
The calculator selects the appropriate formula based on the shape you choose and substitutes your actual dimensions into that formula.
Area calculator example
Suppose you have a rectangle that is 10 meters long and 5 meters wide.
Area = 10 × 5
Area = 50 m²
Therefore, the area of the rectangle is 50 square meters.
Formula used
Area = Length × Width
Square:
Area = Side²
Triangle:
Area = ½ × Base × Height
Circle:
Area = π × Radius²
Trapezoid:
Area = ½ × (Base₁ + Base₂) × Height
Parallelogram:
Area = Base × Height
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Important: This calculator is provided for general informational and educational purposes only. The results are based on the dimensions entered and standard geometric formulas. Always verify important measurements and calculations independently when accuracy is critical.