# Geometric sequence calculator

The following geometric sequence calculator will help you determine the nth term and the sum of the first n terms of an geometric sequence.

Guidelines to use the calculator

If you select an, n is the nth term of the sequence

If you select Sn, n is the first n term of the sequence

For more information on how to find the common difference or sum, see this lesson Geometric sequence

First term of the sequence:

Common ratio:

Enter n:

an   Sn

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