Area & Perimeter Calculator
Calculate the area and perimeter of various geometric shapes with ease.
Square Calculator
Result
Enter values and click Calculate to see the result
Formula Reference
Square
Area: A = s²
Perimeter: P = 4s
Where s is the side length
Rectangle
Area: A = l × w
Perimeter: P = 2(l + w)
Where l is length and w is width
Circle
Area: A = πr²
Circumference: C = 2πr
Where r is radius and π ≈ 3.14159
Triangle
Area: A = √(s(s-a)(s-b)(s-c))
Perimeter: P = a + b + c
Where a, b, c are sides and s = (a+b+c)/2
Tips & Notes
- All measurements should be in the same unit (e.g., cm, m, in, ft).
- For triangles, make sure the sides can form a valid triangle (sum of any two sides must be greater than the third side).
- Results are rounded to 2 decimal places for better readability.
- For more complex shapes, consider breaking them down into simpler shapes and calculating separately.