Number Sequence Calculator

Choose a sequence type, first term, step or ratio, and term count to generate values and summary formulas.

Sequence type

First term a₁

Common difference d

Number of terms n

—nth term

—Sum of n terms

—Minimum shown

—Maximum shown

——

How to use this Number Sequence Calculator

Generate arithmetic or geometric sequences and calculate the nth term and sum. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.