About the Compound Interest Calculator
Compound Interest grows principal at the periodic rate and models equal end-of-period contributions as an ordinary annuity. It separates contributed money from growth for a clearer projection.
How to use the Compound Interest Calculator
- Enter starting balance, nominal annual rate and duration.
- Select compounding frequency and any contribution per period.
- Calculate future value and total interest.
Practical tips
- Match the contribution amount to the selected compounding period.
- Investment returns are uncertain; this is a mathematical scenario, not a forecast.