Area of a Rectangle Calculator

What is a Rectangle?

A rectangle is a quadrilateral (four-sided polygon) with four right angles (90°). Opposite sides are parallel and equal in length. The area represents the amount of space inside the rectangle.

Key Properties

• Opposite sides equal: Length sides are equal, width sides are equal
• All angles 90°: Every corner is a right angle
• Parallel sides: Opposite sides never meet
• Two diagonals: Equal in length and bisect each other

Real-World Applications

• • Construction: Room flooring, wall areas, lot sizes
• • Landscaping: Garden beds, lawn areas, patios
• • Manufacturing: Material calculations, cutting sheets
• • Art & Design: Canvas sizes, frame dimensions
• • Real Estate: Property measurements, floor plans

Calculation Tips

• • Always use consistent units for both dimensions
• • Double-check which dimension is length vs. width
• • Area is always in square units (unit²)
• • For complex shapes, break into rectangles