Compound Interest Calculator

How much will my savings and monthly investments grow?

Compounding means earning returns on your past returns. Enter a starting amount and a monthly contribution to see how your money could grow year by year.

Currency

Embed this calculator on your website (free)

Copy this code into your page. Free to use with the credit link intact.

<iframe src="https://money100x.com/embed/compound-interest-calculator" width="100%" height="720" style="border:1px solid #e5e7eb;border-radius:12px" title="Compound Interest Calculator" loading="lazy"></iframe><p style="font-size:13px">Compound Interest Calculator by <a href="https://money100x.com/tools/compound-interest-calculator">Money100x</a></p>

How this calculator works

Returns compound monthly at the annual rate ÷ 12, and contributions are added at the end of each month. Real returns vary year to year; taxes, fees and inflation are not included.

Frequently asked questions

What return should I assume?

Use a conservative figure. Broad stock markets have historically delivered higher long-term returns than savings accounts, but with big ups and downs and no guarantees.

Why does starting early matter so much?

Money invested earlier has more years to compound, so small amounts started young can outgrow larger amounts started later.

Learn more

Results are estimates based on the numbers you enter and simplified assumptions. They are not financial advice. See our disclaimer.