Compound Interest Calculator
Project how your savings and investments can grow over time with compounding and recurring contributions.
$
$
%
Future Value
$108,653
Total Contributions
$71,000
Total Interest
$37,653
How to use this calculator
Set your starting balance, contribution amount, contribution frequency, annual return, and time horizon. Run multiple scenarios to see how each input affects total growth.
Frequently asked questions
How often should I contribute to maximize compounding?
More frequent contributions can improve outcomes because invested funds compound earlier. Compare frequency settings directly in the calculator.
What interest rate should I use?
Use a realistic long-term estimate based on your risk profile, and test conservative and optimistic assumptions.
Does this include taxes and fees?
No. Results show pure compounding math, so adjust assumptions to reflect expected taxes, fees, and inflation.