±Free
Rectangle measurements
Find area, perimeter and diagonal from width and height.
Enter positive width and height in the same unit. The calculator returns their product for area, twice their sum for perimeter and √(width² + height²) for the 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
Width: 3 Height: 4
Example result
{
"area": 12,
"perimeter": 14,
"diagonal": 5
}Limitations and details
Assumes four right angles; the two dimensions must be positive and expressed in the same length unit.
Inputs and options
- 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.