Geometric Mean Calculator

Find the geometric mean of a data set by entering the numbers in the dataset below.

Number Set:

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Results:

Geometric Mean (x̃):
Numbers in Set (n):

Steps to Solve

Apply the Geometric Mean Formula

\tilde{x} = \sqrt[n]{x_{1} \cdot x_{2} \cdot\cdot\cdot x_{n}}

Step One: Find the Product of the Numbers in the Set

x_{1} \cdot x_{2} \cdot\cdot\cdot x_{n}

Step Two: Find the nth Root

\tilde{x} = \sqrt[n]{\text{product}}

Learn how we calculated this below

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On this page:

• Calculator
• How to Calculate the Geometric Mean
• Geometric Mean Formula
• Step One: Find the Product
• Step Two: Find the Root
• References

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By

Joe Sexton

Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.

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Reviewed by

Brian Libgober, PhD

Brian specializes in political science and statistics with several advanced degrees from Harvard.

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Cite As:

Sexton, J. (n.d.). Geometric Mean Calculator. Inch Calculator. Retrieved November 19, 2024, from https://www.inchcalculator.com/geometric-mean-calculator/

How to Calculate the Geometric Mean

In statistics, given a dataset of n numbers, the geometric mean is the average of a data set that is found using the nth root of the product of each number in the set.

The geometric mean, sometimes also called the geometric average, is similar to the arithmetic mean in that it is a measure of the central tendency of the data, but instead of measuring the center using addition and division, it uses multiplication and the root.

The relationship between the geometric and arithmetic means becomes clearer if you take the logarithm of the geometric mean formula. Doing so, it becomes clear that the logarithm of the geometric mean of some values is the arithmetic mean of the logarithms of these values. For this reason, you can think of the geometric mean as being like an arithmetic mean on the log scale.

The geometric mean is a way of measuring the average of a progression of data, which is why it’s often used in finance, investing, and economics, for instance, to calculate compound interest or return on investment.

Geometric Mean Formula

The geometric mean x̃ can be expressed using the following formula:^[1]

Where:
x_i = each number in the set
n = total number of values in the set

The formula states that the geometric mean x̃ is equal to the product of a set of n numbers, raised to the power of 1 divided by n.

This formula is equivalent to the nth root of the product of the numbers in the set, so a perhaps more familiar formula to find the geometric mean is:

So, the geometric mean x̃ is equal to the nth root of the product of each number x_i in the set, where n is equal to the number of elements in the set.

Using the formula, you can find the geometric mean in a few steps.

Step One: Find the Product

First, find the product of all of the numbers in the set. You can do this by multiplying each number in the set together.

Step Two: Find the Root

Then, count the number of items in the set and set this value to n. Once you have the count, take the nth root of the product.

Note that all values in the data set must be greater than zero for the geometric mean formula to work correctly; negative numbers are not supported by the formula. Using negative numbers could result in taking the square root of a negative, resulting in an imaginary number.