I am trying to take the logarithmic function of a field in ArcMap 10.2 using the field calculator in my attribute table. I can't seem to find any equation that does this and the Help document did not have any formula for this.

I am self-taught ArcMap and still learning.

1 Answer 1


In the field calculator, set your parser to python.

Then you can use the math.log10 function.

Here, I'm updating a field called Log10Num with the log10 of a field called Number.

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