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πŸ’°Compound Interest Calculator

Free online compound interest calculator. Project savings growth with regular contributions and flexible compounding.

Investment Details

Final Balance

$16,470.09
Total Principal$10,000.00
Initial Principal$10,000.00
Contributions$0.00
Total Interest Earned$6,470.09

Note: Interest is compounded per the selected frequency. Contributions are added at the end of each compounding period.

Growth Over Time

$0$4.1K$8.2K$12.4K$16.5KYr 0Yr 5Yr 10
Total BalanceTotal Paid In

Year-by-Year Breakdown

YearStarting BalanceContributionsInterestEnding Balance
1$10,000.00$0.00$511.62$10,511.62
2$10,511.62$0.00$537.79$11,049.41
3$11,049.41$0.00$565.31$11,614.72
4$11,614.72$0.00$594.23$12,208.95
5$12,208.95$0.00$624.63$12,833.59
6$12,833.59$0.00$656.59$13,490.18
7$13,490.18$0.00$690.18$14,180.36
8$14,180.36$0.00$725.49$14,905.85
9$14,905.85$0.00$762.61$15,668.47
10$15,668.47$0.00$801.63$16,470.09

About Compound Interest Calculator

The Compound Interest Calculator projects the growth of your savings using the formula A = P(1+r/n)^(nt), with optional regular contributions and compounding frequencies from annual to daily. Review a year-by-year growth table, visualize the balance curve on a chart, and see the final balance and total interest earned. All calculation happens locally in your browser.

Features

  • Principal, annual rate and term inputs
  • Optional regular contributions
  • Compounding frequency: annual, semiannual, quarterly, monthly, daily
  • Year-by-year growth table
  • Balance chart, final balance and total interest

Frequently Asked Questions

How is compound interest calculated?
The tool uses A = P(1+r/n)^(nt) for the principal, then adds the future value of any regular contributions.
Can I add monthly contributions?
Yes. Enter the contribution amount and choose monthly as the contribution frequency.