# Mentally calculating logarithms

**URL:** https://forum.artofmemory.com/t/mentally-calculating-logarithms/28052
**Category:** Mental Calculation, Mathematics, and Puzzles
**Created:** [January 12, 2013, 8:57pm UTC](https://forum.artofmemory.com/t/mentally-calculating-logarithms/28052 "2013-01-12T20:57:25Z")
**Posts on this page:** 1
**Showing post:** 24

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### Author: ![Kinma](https://forum.artofmemory.com/letter_avatar_proxy/v4/letter/k/a88e4f/32.png) [@Kinma](https://forum.artofmemory.com/u/Kinma)
#### Post date: [March 29, 2018, 1:32am UTC](https://forum.artofmemory.com/t/mentally-calculating-logarithms/28052/24 "2018-03-29T01:32:59Z")

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> [@](#):
>
> perhaps a general method for approximating logarithms could be devised?

I think this is what you are looking for:

> **[Calculating logarithms by hand](https://forum.artofmemory.com/t/calculating-logarithms-by-hand/32855)**
>
> Just for fun, let’s calculate all logarithms from scratch. And let’s start with the logarithm of 2. I start with doubling 2 a couple of times: 2 4 8 16 32 64 128 256 512 1024 Now, 1024 is a number we can easily guess the logarithm...

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