Compound Interest Calculator
The 8th wonder of the world —
compound interest
See how your money grows exponentially over time. Adjust contributions, rate, and frequency to find your ideal investment strategy.
Investment Details
$
S&P 500 historical avg: ~10% nominal, ~7% inflation-adjusted
$
Final Balance after 20 years
$144,573
2.5× your money
Total Contributed
$58,000
Interest Earned
$86,573
Year-by-Year Growth
| Year | Balance | Growth |
|---|---|---|
| Yr 1 | $13,201 | +$801 |
| Yr 5 | $28,495 | +$6,495 |
| Yr 9 | $48,714 | +$17,114 |
| Yr 13 | $75,444 | +$34,244 |
| Yr 17 | $110,783 | +$59,983 |
| Yr 20 | $144,573 | +$86,573 |