Identify arithmetic, geometric and Fibonacci sequences — find the next N terms, the nth term formula and the sum of the known terms.
Enter your figures and click Calculate to see your results.
Enter at least 3 known terms separated by commas — the calculator identifies the sequence type and predicts the next terms.
Press the Calculate button. All results appear instantly — no page reload, no waiting.
Results appear in the panel on the right with all key values clearly labelled. Use Copy to grab the result or Download to save a text file.
Yes — completely free with no sign-up required. All calculations run privately in your browser.
Results use standard mathematical formulas and are accurate to the precision displayed.
Yes — fully responsive and works on all devices including smartphones and tablets.
No — all calculations happen locally in your browser. Nothing is uploaded, logged or stored.
Yes — use the Download button after calculating to save a text file of all your results.
