Area Calculator
Calculate the area of various geometric shapes including circles, rectangles, triangles, squares, and more. Get instant results with step-by-step formulas.
Select a Shape
Calculator Features
Multiple Shapes
Calculate area for rectangles, circles, triangles, squares, and more.
Instant Results
Real-time calculation as you type with high precision.
Formula Display
See the mathematical formula used for each shape.
Unit Flexibility
Works with any unit of measurement (cm, inches, feet, etc.).
How to Use the Area Calculator
1. Select Shape
Choose the geometric shape you want to calculate area for from the available options.
2. Enter Dimensions
Input the required measurements for your selected shape (length, width, radius, etc.).
3. View Results
See the calculated area instantly and the mathematical formula used for the calculation.
4. Switch Shapes
Easily switch between different shapes to calculate areas for various geometric figures.
Understanding Area Calculations
Common Area Formulas
Rectangle: Area = Length × Width
Circle: Area = π × r² (r = radius)
Triangle: Area = (Base × Height) ÷ 2
Square: Area = Side²
Units of Measurement
Area is measured in square units. Common units include square meters (m²), square feet (ft²), square inches (in²), and square centimeters (cm²).
Advanced Shapes
Parallelogram: Area = Base × Height
Trapezoid: Area = ((Base₁ + Base₂) × Height) ÷ 2
Practical Applications
Area calculations are used in construction, landscaping, interior design, engineering, and many other fields where space measurement is important.
Tips for Accuracy
• Use consistent units for all measurements
• Measure carefully and double-check your inputs
• For irregular shapes, break them down into simpler shapes
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