Compound Interest Calculator
Watch how an initial deposit plus regular monthly contributions can grow over time thanks to compounding. This is an estimate, not financial advice.
$37,405
Projected balance
$22,000
Total contributed
$15,405
Interest earned
Estimate only. Not financial advice. Monthly compounding assumed.
How to use
- Enter the initial amount.
- Add the annual interest rate and years.
- Optionally add a monthly contribution.
- Read the projected balance, contributions and interest.
Examples
10,000 at 7% for 10 years, 100/month
Output: About 37,000 total: 22,000 contributed, about 15,000 interest.
Frequently asked questions
What formula is used?
A = P(1 + r/n)^(nt) for the initial amount plus the future value of a series for the monthly contributions, with monthly compounding (n = 12).
Is this financial advice?
No. This is a mathematical estimate. Real returns vary and are never guaranteed.