Find a numbered term and the next term.
Enable JavaScript to enter your own values and calculate in your browser. Your inputs are not sent to a server.
aₙ = a₁ + (n − 1)d.
Using the example inputs, nth term is 39.
Uses your inputs only; results are rounded for display.
OpenStax mathematics
Geometric sequence term
Fibonacci number
Arithmetic series sum
Geometric series sum
Percentage
BUILT FOR CLARITY
An original collection of calculators for everyday estimates and learning.
Calculations run in your browser. This site does not send your inputs to a server or serve advertising. Optional analytics runs only after you allow it. Results are estimates within each tool’s stated scope, not professional advice.
Financial, health and building-related tools have specific limitations. Check important decisions with a qualified professional. No live currency rates, tax tables or current price feeds are connected.