Logarithm Calculator

Calculate logarithm of a number to any base:


* Use e for scientific notation. E.g: 5e3, 4e-8, 1.45e12

Logarithm expression calculator

Expression with log(value,base):


b y = x

Then the base b logarithm of a number x:

logb x = y

Logarithm change of base calculator


Anti-logarithm calculator

In order to calculate log-1(y) on the calculator, enter the base b (10 is the default value, enter e for e constant), enter the logarithm value y and press the = or calculate button:



y = logb x

The anti logarithm (or inverse logarithm) is calculated by raising the base b to the logarithm y:

x = logb-1(y) = b y

Logarithm rules

Logarithm product rule

logb(x × y) = logb(x) + logb(y)

Logarithm quotient rule

logb(x / y) = logb(x) - logb(y)

Logarithm power rule

logb(x y) = y × logb(x)

Logarithm base switch rule

logb(c) = 1 / logc(b)

Logarithm change of base rule

logb(x) = logc(x) / logc(b)


Logarithm - log(x) ►


See also

Features of Logarithm Calculator

Our Logarithm Calculator allows the users to Calculate Logarithm. Some of the prominent features of this utility are explained below.

No Registration

You don’t need to go through any registration process to use the Logarithm Calculator. Using this utility, users to Calculate Logarithm as many times as you want for free.

Fast conversion

This Logarithm Calculator offers users the fastest Calculate. Once the user enters the  Logarithm values ​​in the input field and clicks the Calculate button, the utility will start the conversion process and return the results immediately.

Saves Time and Effort

The manual procedure of Calculator Logarithm isn’t an easy task. You must spend a lot of time and effort to complete this task. The Logarithm Calculator allows you to complete the same task immediately. You will not be asked to follow manual procedures, as its automated algorithms will do the work for you.


Despite investing time and effort in manual Calculation, you might not be able to get your hands on accurate results. Not everyone is good at solving math problems, even if you think you're a pro, there's still a good chance you'll get in accurate results. This situation can be smartly handled with the help of a Logarithm Calculator. You will be provided with 100% accurate results by this online tool.


The online Logarithm converter perfectly works on all operating systems. Whether you have a Mac, iOS, Android, Windows, or Linux device, you can easily use this online Tool without facing any hassle.

100% Free

You don't need to go through any registration process to use this Logarithm Calculator. You can use this utility for free and do unlimited Logarithm Calculate without any limitations.


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