See how money grows when interest is added to the balance and itself earns interest. Choose how often it compounds, add a monthly amount if you like, and see the balance year by year.
loading toolHow to use the compound interest calculator
- Type your numbers in the boxes (pick your currency or units if asked).
- The answer updates as you type: no button to press.
- Copy the result, or share it on WhatsApp with one tap.
Questions
What is the compound interest formula?
A = P × (1 + r/n)^(n×t): P is the starting amount, r the yearly rate, n how many times a year it compounds and t the years.
Does compounding more often make a big difference?
A little. At 12% a year, monthly compounding gives 12.68% a year instead of 12%.
Is my data private?
Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.
Is it free?
Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.
