Compound Interest Calculator
Fill in the values and the answer updates as you type.
How the Compound Interest Calculator works
Future value = P(1 + r)^n + PMT × ((1 + r)^n − 1) ÷ r, with interest compounded monthly.
Inputs and results
The Compound Interest Calculator takes 4 inputs and gives 3 results.
What you enter
- Starting amount ($) — starts at 5000.
- Monthly deposit ($) — starts at 200.
- Annual rate (%) — starts at 6.
- Years (yrs) — starts at 10.
What you get
- Future value
- Total deposited
- Interest earned
Example: Compound Interest Calculator with the starting values
With starting amount 5000 $, monthly deposit 200 $, annual rate 6 % and years 10 yrs, the calculator returns:
| Future value | $41,872.85 |
|---|---|
| Total deposited | $29,000 |
| Interest earned | $12,872.85 |
Change any value above and the results update straight away.
Compound Interest Calculator FAQ
How do I use the Compound Interest Calculator?
Enter starting amount, monthly deposit, annual rate and years in the fields, then read future value, total deposited and interest earned in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Compound Interest Calculator calculate?
See how savings grow with monthly compounding. It returns future value, total deposited and interest earned from the 4 values you provide.
What values does the Compound Interest Calculator start with?
It opens with starting amount 5000 $, monthly deposit 200 $, annual rate 6 % and years 10 yrs so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Compound Interest Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Compound Interest Calculator for financial decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm financial decisions with a qualified professional. See the Disclaimer for more.