> For the complete documentation index, see [llms.txt](https://docs.tabula.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tabula.io/data-transformation/formulas/math-functions/log.md).

# Log

Returns the logarithm of a numeric for the specified base

```mathematica
Log(25, 5) → 2
Log(20, 3.1) → 2.64
```

#### **Inputs**

`Log(number, base)`

* `number`- A number expression
* `base` - Logarithm base to use