Compound Interest Calculator
Project growth with compound interest and contributions.
What this tool does
Enter a starting amount, regular contributions, interest rate, and compounding frequency. See the projected balance, total contributions, and total interest earned over time.
Example input/output
Illustrative sample — your real inputs may look different.
Example input
$10,000 initial · $200/mo · 7% · 20 years
Example output
Final balance ~$142,000 · Contributions $58,000 · Interest ~$84,000
How to use
- Enter the initial deposit and any regular monthly contribution.
- Set the annual interest rate and compounding frequency.
- Choose the time horizon in years to see the projected outcome.