Compound Interest Calculator
See how savings grow with compound interest and monthly deposits. Free, no sign-up, works in your browser.
Year-by-year table
Illustration only — real returns vary and investments can lose value. This is not financial advice.
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How to use the compound interest calculator
- Enter your starting amount, monthly deposit, interest rate and number of years.
- Choose how often interest is compounded and optionally an inflation rate.
- See the final balance, total interest, a growth chart and a year-by-year table.
Compound interest means you earn interest on your interest, so growth speeds up over time — the reason starting early matters so much. Use it to compare savings accounts, plan a pension or emergency fund, or see what a regular monthly investment could become. Adding inflation shows what the final amount would be worth in today’s money.