Rectangle Area Calculator
Result
Area60.00 cm²
Perimeter32.00 cm
Diagonal11.66 cm
Aspect Ratio1.6667:1
↗ Math
Rectangle Area Calculator — free online calculator.
Formula
Area=l×w; perimeter=2(l+w); diagonal=√(l²+w²); aspect=max(l,w)/min(l,w)
- Rectangle area calculator. Apply the geometric relationship below and use the worked example to verify the setup.
- The main inputs are Length (cm), Width (cm). Enter them in the units and format shown in the calculator.
- Keep comparable quantities in compatible units whenever the formula combines or compares them.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Rectangle Area
Inputs
- Length (cm): 10
- Width (cm): 6
For length 8 and width 3: A = 24.
Sample result: Calculating…
Frequently asked questions
What does the Rectangle Area calculate?
Length and width must use compatible units.
Which values should I enter?
Enter Length (cm), Width (cm) using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Area=l×w; perimeter=2(l+w); diagonal=√(l²+w²); aspect=max(l,w)/min(l,w).
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.