Compound Interest Calculator
Calculate compound interest with yearly, half-yearly, quarterly or monthly compounding.
About this calculator
Compounding frequency matters — the more often interest is added, the faster your money grows.
Compare frequencies on the same inputs to see the difference.
All calculations happen in your browser — your numbers are never sent anywhere. Results are estimates for guidance only, not financial advice.
Frequently asked questions
Does compounding frequency matter?
Yes — monthly compounding yields slightly more than annual for the same nominal rate.
What is the compound interest formula?
A = P × (1 + r/n)^(n×t), where n is the number of compounding periods per year.