Rectangle Calculator

Calculate area, perimeter, diagonal, and more for any rectangle

Area: 12 square units
Perimeter: 14 units
Diagonal: 5 units
Length: 3 Width: 4

Understanding Rectangle Properties

Key Formulas

  • • Area = length × width
  • • Perimeter = 2 × (length + width)
  • • Diagonal = √(length² + width²)

Common Applications

  • • Room dimensions and flooring
  • • Construction and architecture
  • • Landscaping and fencing
  • • Material estimation