This geometric mean reference table shows the geometric mean for a range of first number values, assuming a second number of 9. Every figure is computed with the same engine that powers our Geometric Mean Calculator, so the numbers are exact.
| First number | Geometric mean |
|---|---|
| 1 | 3.0000 |
| 2 | 4.2426 |
| 3 | 5.1962 |
| 4 | 6.0000 |
| 6 | 7.3485 |
| 8 | 8.4853 |
| 12 | 10.3923 |
| 20 | 13.4164 |
| 28 | 15.8745 |
| 40 | 18.9737 |
How to use this table
Find the row closest to your first number and read across to the geometric mean. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Geometric Mean Calculator for a precise answer.
Need a value that is not in the table? — the Geometric Mean Calculator does it instantly, for free, with the formula and a worked example built in.
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