This square side from diagonal reference table shows the side length for a range of diagonal values. Every figure is computed with the same engine that powers our Square Side from Diagonal Calculator, so the numbers are exact.
| Diagonal | Side length | Area |
|---|---|---|
| 2.5 | 1.767767 | 3.1250 |
| 5 | 3.535534 | 12.5000 |
| 7.5 | 5.303301 | 28.1250 |
| 10 | 7.071068 | 50.0000 |
| 15 | 10.606602 | 112.5000 |
| 20 | 14.142136 | 200.0000 |
| 30 | 21.213203 | 450.0000 |
| 50 | 35.355339 | 1,250.0000 |
| 70 | 49.497475 | 2,450.0000 |
| 100 | 70.710678 | 5,000.0000 |
How to use this table
Find the row closest to your diagonal and read across to the side length. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Square Side from Diagonal Calculator for a precise answer.
Need a value that is not in the table? — the Square Side from Diagonal Calculator does it instantly, for free, with the formula and a worked example built in.
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