Cuboid surface area
Geometry / FREE CALCULATOR
Calculate the total area of six rectangular faces.
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.
- Enter height. Use the unit shown beside the field.
- Select Calculate and review the result. Select Reset to restore the example inputs.
How the calculation works
2*(Length*Width+Length*Height+Width*Height)
Worked example
Length = 5; Width = 4; Height = 3. Result: 94 square units.
Understand your result
Calculate the total area of six rectangular faces. The result is expressed in square units.
Assumptions and limitations
Assumes a closed rectangular box without openings. Results are rounded for display.
Questions about this tool
What does this tool calculate?
Calculate the total area of six rectangular faces.
What should I check before using the answer?
Assumes a closed rectangular box without openings.
Related guides
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