Compound Interest Calculator
See how a lump sum grows with compound interest — pick the compounding frequency and watch the curve.
Estimates for education only — not investment advice. Real returns are not guaranteed.
How it works
- 1Enter your principal, annual rate, and number of years.
- 2Pick how often interest compounds.
- 3See the future value and how the balance grows year by year.
Use cases
- See how savings grow at different interest rates.
- Compare annual vs daily compounding.
- Understand the power of long time horizons.
Frequently asked questions
What is the compound interest formula?
A = P(1 + r/n)^(n·t), where P is principal, r the annual rate, n the compounds per year, and t the years.
Does this include monthly contributions?
Not here — this tool grows a single lump sum. For regular contributions, use the investment or savings calculators.
Is my input stored?
No. Everything runs in your browser.
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