Area Calculator
Calculate the area of various geometric shapes including squares, rectangles, triangles, circles, and more.
Select Shape
Area Result
0
square units
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calculation method
💡 Tip: Area is measured in square units (e.g., cm², m², in²). Make sure all your measurements use the same unit!
Area Formulas for Common Shapes
Square
A = s²
Where s = side length
Where s = side length
Rectangle
A = l × w
Where l = length, w = width
Where l = length, w = width
Triangle
A = (1/2) × b × h
Where b = base, h = height
Where b = base, h = height
Circle
A = πr²
Where r = radius
Where r = radius
Trapezoid
A = (1/2) × (a + b) × h
Where a, b = parallel sides, h = height
Where a, b = parallel sides, h = height
Parallelogram
A = b × h
Where b = base, h = height
Where b = base, h = height
Real-World Applications
- Real Estate: Calculating property size and flooring needs
- Construction: Estimating materials like paint, tiles, or carpet
- Agriculture: Measuring land area for crops
- Design: Planning layouts and space allocation
References
- Khan Academy. "Area Formulas." 2026.
- Math is Fun. "Area." 2026.