Compound Interest Calculator
See how your investments grow over time with the power of compound interest. Add monthly contributions to supercharge your savings.
Calculator
How it Works
Compound interest calculates interest on both the principal and previously accumulated interest.
A = P(1 + r/n)^(nt) + PMT × [(1 + r/n)^(nt) - 1] / (r/n)
Real-World Example
Scenario:
$10,000 initial investment, 7% annual return, $500/month contributions for 20 years.
Calculation:
Initial: $10,000 | Contributions: $120,000 | Interest: ~$175,000
Result:
Final balance: approximately $305,000