📐 Online Area Calculator
Select a shape, enter dimensions, pick a unit, and calculate the area instantly.
About Area Calculation
Area measures the space inside a two‑dimensional shape. It’s expressed in square units such as m², cm², ft², etc. Knowing how to compute area is essential for geometry, construction, landscaping, interior design, and many DIY projects.
Formulas Used in This Calculator
- Square: side² (s²)
- Rectangle: length × width (l × w)
- Triangle: ½ × base × height (½ b h)
- Circle: π × radius² (π r²)
- Parallelogram: base × height (b h)
- Trapezoid: ½ × (base₁ + base₂) × height (½ (b₁ + b₂) h)
- Ellipse: π × semi‑major axis × semi‑minor axis (π a b)
How to Use the Tool
- Select the shape you want to evaluate.
- Enter the required dimensions (each shape will show the needed fields).
- Choose your preferred measurement unit (cm, m, in, or ft).
- Click Calculate Area. The result appears instantly with the formula used.
Our free area calculator is accurate, mobile‑friendly, and works directly in your browser. Ideal for students, teachers, engineers, and anyone needing quick area computations.
