MAXScanner calculator widget
Rectangle Calculator — Area, Perimeter & Diagonal
Editable live calculator
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No hidden assumptions. Inputs, units and the working stay visible so you can check the calculation.
Calculated result
Area 108
Perimeter: 42
Diagonal: 15
Aspect ratio: 4:3
Show the working
- 1. Area = 12 × 9 = 108.
- 2. Perimeter = 2(12 + 9) = 42.
- 3. Diagonal = √(12² + 9²) = 15.
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