Square Area and Diagonal Calculator
Calculate the area, perimeter and diagonal of a square from the length of one side. Enter side length to see area, perimeter and diagonal when you…
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Calculate the area, perimeter and diagonal of a square from the length of one side. Enter side length to see area, perimeter and diagonal when you calculate.
Worked example
Example calculated from the starting values. Enter your own values and press Calculate to get your result.
With the default inputs (side length = 7), the results are: area 49.000; perimeter 28.000; diagonal 9.899.
Quick reference: side length vs result
Reference table based on the example values; it is not your calculation result.
| Side length | Area | Perimeter | Diagonal |
|---|---|---|---|
| 3.5 | 12.250 | 14.000 | 4.950 |
| 7 | 49.000 | 28.000 | 9.899 |
| 14 | 196.000 | 56.000 | 19.799 |
| 35 | 1,225.000 | 140.000 | 49.497 |
| 70 | 4,900.000 | 280.000 | 98.995 |
| 140 | 19,600.000 | 560.000 | 197.990 |
Frequently asked questions
What formula does this calculator use?
Area = s^2; Perimeter = 4 × s; Diagonal = s × sqrt(2). Variables: s = side length.
What do I need to enter?
You need side length. Results update as you type.
What is an example result?
With the default inputs (side length = 7), the results are: area 49.000; perimeter 28.000; diagonal 9.899.
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