Number Sequence Calculator
Find the nth term and sum of an arithmetic sequence.
Result
Results are estimates for general information only and are not professional advice.
Arithmetic sequences
In an arithmetic sequence each term increases by a fixed amount d. The nth term is a₁ + (n−1)d and the sum of the first n terms is n/2 × (2a₁ + (n−1)d). This calculator computes both.
Frequently Asked Questions
What is the Number Sequence Calculator?
Find the nth term and sum of an arithmetic sequence. It runs instantly in your browser and is completely free.
Is the Number Sequence Calculator free and does it require signup?
Yes. Every calculator on Calculatis is 100% free with no registration, and the values you enter are never stored.
How accurate is the Number Sequence Calculator?
It uses standard, widely-accepted formulas. Results are reliable estimates for general use and are not a substitute for professional advice.