Yes. The formula counts all six faces of a closed rectangular prism; subtract openings separately.
Surface Area Calculator
Enter your values below to get the result first, then scroll for the full explanation and guidance.
Total surface area
52 sq mClosed rectangular prism
Total surface area: 52 sq m (Closed rectangular prism)
This adds all six outer faces of a closed rectangular prism. It does not subtract openings.
Surface area method
This adds all six outer faces of a closed rectangular prism. It does not subtract openings.
Result snapshot
A quick visual read of the values behind this result.
Formula2 × (length × width + length × height + width × height)
Recommended next checks
- →Subtract any openings separately if the project requires net coverage.
- Formula
- 2 × (length × width + length × height + width × height)
Try different values to compare results.
Enter length, width and height in metres to find the total area of all six outer faces of a closed rectangular prism.
Total surface area
52 sq mClosed rectangular prism
Total surface area: 52 sq m (Closed rectangular prism)
This adds all six outer faces of a closed rectangular prism. It does not subtract openings.
Surface area method
This adds all six outer faces of a closed rectangular prism. It does not subtract openings.
Result snapshot
A quick visual read of the values behind this result.
Formula2 × (length × width + length × height + width × height)
Recommended next checks
- →Subtract any openings separately if the project requires net coverage.
- Formula
- 2 × (length × width + length × height + width × height)
Try different values to compare results.
Table of Contents
Table of Contents
About Surface Area Calculator
Surface Area Calculator helps you work through the main numbers for this topic quickly with a simple input flow and an instant result.
Use the calculator result as a practical starting point, then review the explanation and assumptions on the page if you want more context.
Rectangular prism surface area
Surface area = 2 x (length x width + length x height + width x height). For 2 m, 3 m and 4 m, the result is 52 sq m.
Formula explained
Rectangular prism surface area
Calculate the total outer surface area of a closed rectangular prism from three dimensions.
Formula
Area = 2 x (length x width + length x height + width x height)
How the result is built
1Enter the labelled values using the stated units.
2Apply Area = 2 x (length x width + length x height + width x height).
3Read the result alongside the page assumptions and scope limits.
Example
Example: a 2 m x 3 m x 4 m closed prism has 52 sq m of surface area.
Assumptions
- The shape is a closed rectangular prism with all six faces.
- Surface area = 2 x (length x width + length x height + width x height).
Source basis
- Standard rectangular-prism geometry
FAQ
Common questions
Trust and notes
Assumptions and important notes
This calculator is designed to give a fast estimate using the method shown on the page. Results are most useful when your inputs are accurate and the tool matches your situation.
Use the result as guidance rather than a final diagnosis or professional decision. If the result could affect health, legal, financial, or compliance decisions, verify it with a qualified source where appropriate.
- The shape is a closed rectangular prism with all six faces.
- Surface area = 2 x (length x width + length x height + width x height).
Method
Rectangular prism surface area
Last reviewed
October 12, 2026