Area Calculator
Calculate the area of a rectangle from its length and width. Review the formula and assumptions before using the result.
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Formula
Area of a rectangle = length × width. Both dimensions must use the same unit.
Worked example
A rectangle 10 units long and 5 units wide has an area of 50 square units.
What the result means
The answer is in squared input units (for example, cm² if both dimensions are in centimeters). This calculates rectangles only.
How to Use Area Calculator
Enter the requested values
Provide the inputs for this area calculator. Use consistent units where applicable.
Read the rectangle area
The result recalculates as you edit the inputs.
Check the area calculator assumptions
Use the area calculator formula and notes below to understand what is—and is not—included.
Key Features & Benefits
Formula and worked example
A rectangle 10 units long and 5 units wide has an area of 50 square units.
Clear scope
The answer is in squared input units (for example, cm² if both dimensions are in centimeters). This calculates rectangles only.
Frequently Asked Questions
What shapes does this support?
This calculator finds rectangle area from length and width only.
What unit is the result in?
The input unit is squared, such as meters squared when both dimensions are in meters.
Key terms
- area calculator
- The answer is in squared input units (for example, cm² if both dimensions are in centimeters). This calculates rectangles only.