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Compound Interest Calculator
Use our free Compound Interest Calculator to estimate investment growth
with an initial investment, monthly contributions, interest rate,
compounding frequency, and investment period.
Investment Growth Results
Future Value
-
Total Contributions
-
Total Interest Earned
-
Investment Period
-
Contributions vs. Interest
Contributions: 0%
Interest: 0%
Calculation Details
Rate: -
Compounding: -
Monthly Contribution: -
Years: -
Year-by-Year Growth
| Year |
Start Balance |
Contributions |
Interest Earned |
End Balance |
What Is Compound Interest?
Compound interest is interest calculated on the original amount
invested and on previously accumulated interest. Over time, this can
cause the balance to grow at an increasing rate.
How Does This Compound Interest Calculator Work?
Enter your initial investment, monthly contribution, annual interest
rate, compounding frequency, and investment period. The calculator
estimates the balance over time and provides a year-by-year breakdown.
Compound Interest Formula
A = P(1 + r/n)nt
A = Future value
P = Initial principal
r = Annual interest rate in decimal form
n = Number of compounding periods per year
t = Time in years
Why Regular Contributions Matter
Regular contributions add additional money to an investment over time.
When those contributions also earn returns, the long-term result can
be significantly greater than investing only an initial amount.
Important:
This calculator provides an estimate based on the values entered.
Actual investment returns can differ because of market performance,
fees, taxes, contribution timing, and other factors. This tool does
not provide financial advice.
Frequently Asked Questions
What is compound interest?
Compound interest allows interest to accumulate on the original
principal as well as previously accumulated interest.
Does this calculator support monthly contributions?
Yes. You can enter a recurring monthly contribution and see its
estimated effect on the future value.
Can I change the compounding frequency?
Yes. You can choose annual, semi-annual, quarterly, monthly,
weekly, or daily compounding.
Are the calculated investment returns guaranteed?
No. The calculation is an estimate based on the assumed interest
rate and contribution pattern. It does not guarantee future returns.
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