This diagonal of cube reference table shows the space diagonal for a range of side length values. Every figure is computed with the same engine that powers our Diagonal of Cube Calculator, so the numbers are exact.
| Side length | Space diagonal |
|---|---|
| 1.3 | 2.251666 |
| 2.5 | 4.330127 |
| 3.8 | 6.581793 |
| 5 | 8.660254 |
| 7.5 | 12.990381 |
| 10 | 17.320508 |
| 15 | 25.980762 |
| 25 | 43.301270 |
| 35 | 60.621778 |
| 50 | 86.602540 |
How to use this table
Find the row closest to your side length and read across to the space diagonal. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Diagonal of Cube Calculator for a precise answer.
Need a value that is not in the table? — the Diagonal of Cube Calculator does it instantly, for free, with the formula and a worked example built in.
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