Rectangle Area Calculator
Calculate rectangle area, perimeter, and diagonal.
Enter Length and Width
Area: 40 square units
Perimeter: 26 units
Diagonal: 9.43 units
Perimeter: 26 units
Diagonal: 9.43 units
Calculations:
Area: A = length × width = 8 × 5 = 40
Perimeter: P = 2(length + width) = 2(8 + 5) = 26
Diagonal: d = √(length² + width²) = √(64 + 25) = 9.43
Rectangle Formulas
Area: A = length × width
Perimeter: P = 2(length + width)
Diagonal: d = √(length² + width²)
How to Calculate Rectangle Area
- Measure the length (longer side)
- Measure the width (shorter side)
- Multiply length × width
Understanding the Formulas
- Area measures the space inside the rectangle
- Perimeter measures the distance around the rectangle
- Diagonal is found using the Pythagorean theorem
Real-World Applications
Rectangle calculations are used in: - Construction and flooring - Gardening and landscaping - Interior design - Painting and wallpaper - Any rectangular space planning
Common Questions
What is the formula for rectangle area?
The rectangle area formula is A = length × width. Simply multiply the length by the width to find the area.
How do you find the perimeter of a rectangle?
The perimeter formula is P = 2(length + width) or P = 2length + 2width. Add all four sides together.