Geometric Sequence Calculator
Find the nth term and sum of a geometric sequence.
Result
Results are estimates for general information only and are not professional advice.
Geometric sequences
In a geometric sequence each term is multiplied by a fixed ratio r. The nth term is a₁ × r^(n−1) and the sum of the first n terms is a₁ × (rⁿ − 1) ÷ (r − 1). This calculator computes both.
Frequently Asked Questions
What is the Geometric Sequence Calculator?
Find the nth term and sum of a geometric sequence. It runs instantly in your browser and is completely free to use.
What do I need to enter to use the Geometric Sequence Calculator?
The Geometric Sequence Calculator asks for the following values (3): First term (a₁), Common ratio (r), Term number (n). Fill them in and the result appears immediately — the calculation runs on your own device, so nothing you type is sent to a server.
How accurate is the Geometric Sequence Calculator?
The Geometric Sequence Calculator uses standard, widely-accepted formulas, so its figures are reliable estimates for everyday planning. They are not a substitute for advice from a qualified professional.
Is the Geometric Sequence Calculator free, and do I need an account?
Yes. The Geometric Sequence Calculator — and every other calculator on Calculatis — is completely free, with no registration, no download and no limit on how often you use it.