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Compound Interest Calculator
See the power of compounding — how a small investment today becomes a large one tomorrow.
Investment Details
Rate & Settings
Future Value
$145.2K
after 20 years
Interest Earned
$87.2K
60% of total
Total Contributed
$58.0K
principal + additions
Inflation-Adjusted
$80.4K
in today's money
10.2 yrs
Rule of 72 — money doubles at 7%
Year 3
Initial investment doubles
Year 13
Halfway to final value
Portfolio Growth
Contributions
Interest Earned
Year-by-Year Breakdown
| Year | Contributed | Interest Earned | Balance | Inflation-Adj |
|---|---|---|---|---|
| 1 | $12,400 | $801 | $13,201 | $12,817 |
| 2 | $14,800 | $1,834 | $16,634 | $15,679 |
| 3 | $17,200 | $3,115 | $20,315 | $18,591 |
| 4 | $19,600 | $4,662 | $24,262 | $21,557 |
| 5 | $22,000 | $6,495 | $28,495 | $24,580 |
| 6 | $24,400 | $8,633 | $33,033 | $27,665 |
| 7 | $26,800 | $11,100 | $37,900 | $30,816 |
| 8 | $29,200 | $13,918 | $43,118 | $34,038 |
| 9 | $31,600 | $17,114 | $48,714 | $37,335 |
| 10 | $34,000 | $20,714 | $54,714 | $40,712 |
| 11 | $36,400 | $24,747 | $61,147 | $44,174 |
| 12 | $38,800 | $29,246 | $68,046 | $47,726 |
| 13 | $41,200 | $34,244 | $75,444 | $51,374 |
| 14 | $43,600 | $39,776 | $83,376 | $55,121 |
| 15 | $46,000 | $45,882 | $91,882 | $58,976 |
| 16 | $48,400 | $52,603 | $101,003 | $62,941 |
| 17 | $50,800 | $59,983 | $110,783 | $67,025 |
| 18 | $53,200 | $68,070 | $121,270 | $71,233 |
| 19 | $55,600 | $76,915 | $132,515 | $75,571 |
| 20 | $58,000 | $86,573 | $144,573 | $80,046 |
Disclaimer: Returns shown are hypothetical based on a fixed annual rate. Actual investment returns fluctuate and are not guaranteed. Past performance does not predict future results. This is not financial advice.