Compound interest calculator
See how savings grow with regular deposits, with a chart.
Processed on your deviceHow to calculate compound interest
- 1
Enter your starting amount, how much you'll add each month, the annual interest rate and the number of years.
- 2
Choose how often interest compounds.
- 3
Read your final balance and see how much came from your deposits versus interest in the chart and table.
Frequently asked questions
What is compound interest?
Interest that's added to your balance and then earns interest itself. Over long periods, the interest on interest can grow larger than your deposits.
When are monthly deposits added?
At the end of each month, after that month's interest. Deposits at the start of the month would grow slightly more.
Does this include inflation or taxes?
No. Real returns vary, and inflation, fees and taxes reduce growth. Treat the results as an illustration, not a forecast.