Rectangle area
Geometry / FREE CALCULATOR
Find the area of a rectangular surface.
Your answer starts here.
Enter your values and select Calculate to see the result and any available breakdown.
How to use this calculator
- Enter length. Use the unit shown beside the field.
- Enter width. Use the unit shown beside the field.
- Select Calculate and review the result. Select Reset to restore the example inputs.
How the calculation works
Length*Width
Worked example
Length = 8; Width = 5. Result: 40 square units.
Understand your result
Find the area of a rectangular surface. The result is expressed in square units.
Assumptions and limitations
Length and width must use the same unit; result is in square units. Results are rounded for display.
Questions about this tool
What does this tool calculate?
Find the area of a rectangular surface.
What should I check before using the answer?
Length and width must use the same unit; result is in square units.
Related guides
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