How to Calculate Antilog in Excel: 5 Easy Ways - ExcelFlash (2024)

Prologue

In this article, you’ll learn about 5 simple formulas to calculate antilog in Excel.

We use the antilog in pH calculations – if you know the pH value, using the antilog, you can find the concentration of hydrogen ions.

Moreover, you can calculate sound decibels, compound interest, earthquake levels, and drug dosage duration with the antilog.

What Is Antilog?

Before learning about antilog, you should know about log. A logarithm is similar to a secret code in that it tells you how many times you must divide a number by a specific value in order to get a specific result. It is a method for calculating the number of times to divide a number.

Now, let’s learn what an antilog is. Antilog is basically the inverse of log.

Assume you have a secret formula that allows you to multiply a number by itself a large number of times. This is comparable to giving the number special powers. If someone tells you the outcome and how many times you multiplied, you can use the antilog to find the starting number.

Therefore, the antilog aids in locating the initial number you started with if you have a final number and are aware of how many times you multiplied it. It is like a way to undo multiplication and find the secret ingredient!

The following formula shows the logarithmic value of a number ‘b’ and the result is ‘x’. Moreover, how do you calculate the antilog of that ‘x’.

The following table shows the log and antilog of a few numbers.

5 Ways to Calculate Antilog in Excel

We’ll use two generic formulas and the EXP and POWER functions to calculate the antilog for the first four methods. Lastly, we’ll show you how to utilize VBA to create a custom function called the ‘ANTILOG’ function to calculate the antilog of numbers.

Antilog of Base 10 in Excel

For the first example, we’ll find the antilog of base 10 log values. Type the following formula in cell C3.

=10^B3

Then, use the Fill Handle to autofill the formula up to cell C6.

Antilog of Natural Logarithm

For the second example, we’ll find the antilog of base e log values using the EXP function. This is also called the natural logarithm. After that, use the following formula in cell C3.

=EXP(B3)

Lastly, use the Fill Handle to autofill the formula up to cell C6.

Antilog of Random Base in Excel

The base of the logarithm can be anything; we’ve chosen 7 as the base. You’ll need to press F4 after linking that base to a cell to lock the base cell reference. Then, type the following formula in cell C3.

=$C$8^B3

Finally, fill the formula up to cell C6.

POWER Function to Find Antilog in Excel

You can also use the POWER function to find the antilog for a random logarithmic base. The base of the logarithm can be anything. Afterward, type the following formula in cell C3.

=POWER($C$8,B3)

Then, fill the formula up to cell C6. Additionally, remember to use the absolute cell reference to keep the base cell locked when applying the formula to the other cells. For that, you’ll need to press F4 to use the absolute cell reference on the first argument.

Applying User Defined ANTILOG Function in Excel

In this last method, you’ll learn how to create a user defined function in Excel using VBA. After doing so, we’ll use that function to calculate the antilog of numbers.

• Firstly, press Alt+F11 or select Visual Basic from the Developer tab.

• Then, the VBA window will appear.
• After that, Insert a Module in the window.

• Then, type the following VBA code in the Module window.

Function ANTILOG(Base As Long, Value As Long) As Long
ANTILOG = Base ^ Value
End Function

• Then, close the window. A function called ‘ANTILOG’ will be created in the Excel file. Remember to save your file as xlsm to preserve the VBA code. If you save it in the xlsx format, then the code will be discarded. So, be careful with the Macro.
• Afterward, start typing the function in cell C3.
• You’ll see the function listed under the User Defined Functions list.

• Then, hit Tab and type the two arguments. The first one is the base, and the second one is the value of the log.

• Afterward, press Enter and copy the formula up to cell C6.
• Finally, it will calculate the antilog values.

Interesting Facts About Antilog in Excel

• Contrary to log, antilog allows the use of negative numbers.
• Excel has a maximum and minimum range of allowable values for numbers. Thus, it will thus generate the #NUM! error after reaching that limit.
• Antilog is always positive.
• The characteristic and mantissa of the number 11.1718 are 11 and, respectively, 1718.

Answers to Commonly Asked Questions

Question 1: How do you calculate antilog in Excel 2010?

ExcelFlash: You can use the POWER and EXP functions to calculate the antilog in Excel 2010. Additionally, you can use the formula (=Base^Log Value) to also find the antilog. Moreover, you can create a custom function to calculate antilog in Excel 2010.

Question 2: How do I calculate the log in Excel?

ExcelFlash: There are several functions in Excel to calculate the log. You can use the built-in LOG, LOG10, and LN functions to do so. The following image shows how to calculate a log in Excel using the LOG function. The formula in cell D3 is

=LOG(B3,C3)

Question 3: How do I find the antilog of base 2 of a number?

ExcelFlash: You can use the POWER function to calculate the base 2 antilog. For example, if you want to know the antilog for 5, type this formula.

=POWER(2,5)

You’ll get 32 from this formula.

Epilogue

You’ve seen 5 ways to calculate antilog in Excel. If you have any feedback for us, feel free to comment below. You can also follow ExcelFlash on Twitter and YouTube.