Area Calculator

Area measures the 2D space inside a shape (cm², m², ft²). Perimeter is the total boundary length. Both are fundamental in construction, interior design, and planning. Key formulas: Rectangle: Area = l × w, Perimeter = 2(l+w). Circle: Area = πr², Circumference = 2πr. Triangle: Area = ½ × base × height. Trapezoid: Area = ½(a+b) × height. Practical uses: Paint coverage (area of walls), flooring, garden sizing, fabric cutting, land area, carpet installation, and window sizing. Unit conversions: 1 m² = 10,000 cm². 1 km² = 1,000,000 m². 1 acre ≈ 4,047 m². 1 hectare = 10,000 m². For irregular shapes: Divide into simple rectangles and triangles, calculate each separately, then add together. This is how architects and surveyors handle complex floor plans.