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Home/Finance/Compound Interest Calculator

Compound interest calculator

See how savings grow with compound interest and regular monthly deposits, year by year.

Final balance1,303,464.25
Total deposited700,000.00
Interest earned603,464.25
YearDepositedBalance
1160,000.00173,822.71
2220,000.00255,375.63
3280,000.00345,468.20
4340,000.00444,994.64
5400,000.00554,942.80
6460,000.00676,403.97
7520,000.00810,583.71
8580,000.00958,813.82
9640,000.001,122,565.56
10700,000.001,303,464.25

Why use this tool

  • PrivateRuns on your device — nothing is uploaded
  • FastWorks instantly, no waiting in a queue
  • FreeNo signup, no watermark, no limits
  • Any devicePhone, tablet or computer

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See how savings grow with compound interest

Compound interest means you earn returns on your earlier returns, so money grows faster the longer it is left alone. This calculator shows how a starting amount and regular monthly additions could grow over time.

Enter the starting amount, the monthly contribution, an expected yearly return and the number of years. A year-by-year table shows how much you put in and how much came from growth. Real returns go up and down and are not guaranteed, so test a few different rates.

The calculation runs in your browser. It is an estimate for planning, not financial advice.

Frequently asked questions

What is compound interest?

Interest that is added to your balance, so the next period earns interest on the interest too.

Are the results guaranteed?

No. They assume a constant rate. Real investment returns go up and down; this is an estimate, not financial advice.

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