# Geometric Series Online Calculator

Online calculator to calculate the sum of the terms in a geometric sequence.

If A1, A2, ... , An, ... is a geometric sequence with common ratio r, this calculator calculates the sum Sn given by

^{n})/(1-r)

and the nth term an = a1 r

^{n - 1}

## Use of the Geometric Series calculator

1 - Enter the first term **A1** in the sequence, the common ratio **r** and **n** n the number of terms in the sum then press enter. A1 and r may be entered as an integer, a decimal or a fraction. n must be a positive integer.