Area of a Rectangle Calculator
Calculate the area of a rectangle using length and width. Get instant results with step-by-step solutions and visual formulas.
Rectangle Dimensions
cm
cm
Formula
Area = Length × Width
Where:
- Area =Area of the rectangle
- Length =Length of the rectangle
- Width =Width of the rectangle
Rectangle Diagram
Red line: Length dimension
Green line: Width dimension
Purple dashed: Diagonal
Blue area: Rectangle area (l × w)
Rectangle Formulas
Area
A = l × w
Perimeter
P = 2(l + w)
Diagonal
d = √(l² + w²)
Common Rectangle Areas
Dimensions (l × w)Area
1 × 11 unit²
2 × 36 units²
4 × 520 units²
6 × 848 units²
10 × 12120 units²
Understanding Rectangle Area
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
Frequently Asked Questions - Area of a Rectangle Calculator
The formula for the area of a rectangle is A = l × w, where A is the area, l is the length, and w is the width of the rectangle.