**tariqtongue**Hi,

For some reason I am not getting the correct answer for Natural LOG.

The answer to LOG(.72) is -0.14

I am getting -0.33

Am I using the wrong one or what?

- JotForm Support
**Richie_P**With the form Calculation, we have base-10 logarithm-

**LOG10E**and base-2 logarithm**LOG2E**.The Form Calculation has different formula from other scientific calculator with Logs.

Try using this formula,

Here is a sample screen cast.

Please let us know if you need further assistance.