±Free
Rectangular prism
Find volume, surface area and space diagonal of a rectangular box.
Enter three positive edge lengths in a common unit. The tool returns lwh for volume, 2(lw + lh + wh) for all six faces and √(l² + w² + h²) for the space diagonal.
How to use
- Enter your text, values, or image.
- Adjust the options and run the tool.
- Copy or download your result.
Worked example
Example input
Length: 2 Width: 3 Height: 4
Example result
{
"volume": 24,
"surfaceArea": 52,
"diagonal": 5.38516480713
}Limitations and details
Assumes mutually perpendicular edges and a closed box; it does not account for wall thickness or subtract interior spaces.
Inputs and options
- Length
- Number
- Width
- Number
- Height
- Number
Frequently asked questions
Is this tool free and private?
Yes. All 300 tools are free in this phase. Processing happens in your browser; your input and files are not sent to our servers.