About the Geometric Sequence Calculator
Find the nth term and the sum of a geometric sequence. This tool is free, works in your browser and needs no sign-up.
How to use the Geometric Sequence Calculator
Enter the first term, the common ratio and the number of terms.
Formula used
nth term = a1 × r^(n − 1). Sum = a1 × (1 − r^n) ÷ (1 − r).
Example
With First term 2, Common ratio 3, Number of terms 6, the calculator shows: nth term = 486; Sum of terms = 728.
Frequently asked questions
Is the Geometric Sequence Calculator free to use?
Yes. It is completely free and you can use it as many times as you like.
How accurate is the Geometric Sequence Calculator?
The calculator uses standard formulas, so the maths is exact. Real life results can differ because of fees, taxes, rounding or personal factors, so treat the answer as an estimate.
Do you store the numbers I enter?
No. All calculations run in your browser. The values you type are not sent to our server.
Disclaimer: results are estimates for information only. They are not financial, medical or professional advice.