Area Calculator

Calculate the area of various geometric shapes with formulas and examples

Select a Shape

⬛
Rectangle
Length × Width
⬜
Square
Side × Side
⭕
Circle
π × radius²
🔺
Triangle
½ × Base × Height
▱
Parallelogram
Base × Height
⬟
Trapezoid
½ × (a + b) × h
⬭
Ellipse
π × a × b
◆
Rhombus
½ × d₁ × d₂

Rectangle Area Calculator

Area = Length × Width

Rectangle Examples

Room Floor

Length: 4 meters, Width: 3 meters

Area = 4 × 3 = 12 m²
Garden Plot

Length: 10 feet, Width: 6 feet

Area = 10 × 6 = 60 ft²

Circle Area Calculator

Area = π × radius² ≈ 3.14159 × r²

Radius = Diameter ÷ 2

Circle Examples

Pizza

Radius: 8 inches

Area = π × 8² = 201.06 in²
Circular Garden

Diameter: 6 meters (radius = 3m)

Area = π × 3² = 28.27 m²

Triangle Area Calculator

Area = ½ × Base × Height

Triangle Examples

Right Triangle

Base: 6 cm, Height: 4 cm

Area = ½ × 6 × 4 = 12 cm²
Triangular Sign

Base: 2 meters, Height: 1.5 meters

Area = ½ × 2 × 1.5 = 1.5 m²

Area Calculation Tips

📏 Consistent Units

Always use the same units for all measurements. The result will be in square units (e.g., m² for meters).

📐 Measuring Techniques

For irregular shapes, break them down into simpler shapes and add their areas together.

🔢 Precision

Use more decimal places for precise calculations, especially for circles where π is involved.

📊 Real Applications

Area calculations are useful for flooring, painting, gardening, construction, and material estimation.