Step-by-step instructions
- Enter or select Length.
- Enter or select Width.
- Tap Calculate.
- Review the result shown directly below the calculator.
Rectangle Calculator
Calculate area and perimeter of a rectangle.
How to use the Rectangle Calculator
Calculate area and perimeter of a rectangle.
What the inputs mean
- Length
- Enter the measurement shown, using consistent units.
- Width
- Enter the measurement shown, using consistent units.
Formula or calculation method
Rectangle area is length × width; perimeter is twice the sum of length and width.
Example
Try entering realistic values for Length and Width, then tap Calculate to see how the result changes.
How to understand the result
Use the result as an estimate based on the values you entered. For planning decisions, double-check that the input units and assumptions match your real situation.
Tip: Keep all values in compatible units and use values from the same time period when the calculator compares two amounts.