Rectangle Area Calculator
Calculate rectangle area, perimeter, and diagonal instantly with our free rectangle calculator. Perfect for construction projects, room measurements, flooring calculations, and DIY work. Get accurate results with step-by-step solutions.
rectangle
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Common Rectangle Sizes
Popular room dimensions for quick calculations
1Rectangle Dimensions
Enter length and width to calculate area, perimeter, and diagonal
How it works: Enter the length and width of your rectangle. The calculator will find the area (space inside), perimeter (distance around), and diagonal (corner-to-corner distance).
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