See exactly how your money grows — with any rate, timeframe, and monthly contribution.
Investment Parameters
Results
Principal + Contributions
$58,000.00
money in
Interest Earned
$86,572.72
growth
Effective Annual Rate
7.2290%
after compounding
Contributions vs. Interest
Growth Over Time
Disclaimer: This calculator is for informational purposes only and does not account for taxes, fees, inflation, or variable returns. Past performance does not guarantee future results. Consult a financial advisor before making investment decisions.
Our compound interest calculator shows you exactly how your savings or investment grows over time. Enter your starting principal, annual interest rate, compounding frequency (daily, monthly, quarterly, or annually), and an optional monthly contribution to instantly see your future value, total interest earned, and a full year-by-year breakdown of your wealth-building journey.
Compound interest is interest calculated on both your initial principal and the accumulated interest from previous periods. Unlike simple interest, it causes your balance to grow exponentially over time — the longer you invest, the more powerful the effect becomes.
More frequent compounding means interest is calculated and added to your balance more often, giving it more opportunities to earn further interest. Daily compounding yields slightly more than monthly, which yields more than annual compounding, though the difference narrows as frequency increases.
Each monthly contribution earns compound interest from the moment it is added. The calculator converts the annual rate to an effective monthly rate based on your chosen compounding frequency, then accumulates each payment individually — giving you an accurate future value that accounts for the timing of every contribution.
The effective annual rate (EAR) is the true yearly return after compounding is applied. For example, a 7% nominal rate compounded monthly produces an EAR of about 7.2290%. It lets you compare accounts with different compounding frequencies on a like-for-like basis.