Compound Interest Calculator
See how your money grows over time with the power of compounding. Enter your numbers below for instant results.
Your Numbers
Total Balance
$284,669.8
Contributions
$130,000
Interest Earned
$154,669.8
54% of total
Growth Over Time
Year-by-Year Breakdown
| Year | Balance | Contributions | Interest |
|---|---|---|---|
| 0 | $10,000 | $10,000 | $0 |
| 1 | $16,700 | $16,000 | $700 |
| 2 | $23,869 | $22,000 | $1,869 |
| 3 | $31,539.83 | $28,000 | $3,539.83 |
| 4 | $39,747.62 | $34,000 | $5,747.62 |
| 5 | $48,529.95 | $40,000 | $8,529.95 |
| 6 | $57,927.05 | $46,000 | $11,927.05 |
| 7 | $67,981.94 | $52,000 | $15,981.94 |
| 8 | $78,740.68 | $58,000 | $20,740.68 |
| 9 | $90,252.52 | $64,000 | $26,252.52 |
| 10 | $102,570.2 | $70,000 | $32,570.2 |
| 11 | $115,750.12 | $76,000 | $39,750.12 |
| 12 | $129,852.62 | $82,000 | $47,852.62 |
| 13 | $144,942.31 | $88,000 | $56,942.31 |
| 14 | $161,088.27 | $94,000 | $67,088.27 |
| 15 | $178,364.45 | $100,000 | $78,364.45 |
| 16 | $196,849.96 | $106,000 | $90,849.96 |
| 17 | $216,629.46 | $112,000 | $104,629.46 |
| 18 | $237,793.52 | $118,000 | $119,793.52 |
| 19 | $260,439.06 | $124,000 | $136,439.06 |
| 20 | $284,669.8 | $130,000 | $154,669.8 |
What is Compound Interest?
Compound interest is often called the "eighth wonder of the world" — and for good reason. Unlike simple interest, which is calculated only on your original deposit, compound interest is calculated on both your initial principal and the interest that has already accumulated.
This means your money earns interest on interest, creating a snowball effect that accelerates your wealth growth over time.
The Compound Interest Formula
- A = Final amount
- P = Initial principal
- r = Annual interest rate (decimal)
- n = Compounds per year
- t = Number of years
Tips to Maximize Compound Interest
- Start early: Time is your biggest advantage.
- Contribute regularly: Monthly contributions supercharge compounding.
- Reinvest returns: Let your interest compound — don't withdraw it.
- Choose higher frequency: Monthly or daily compounding beats annual.
Popular Compound Interest Calculations
$10,000 at 7% for 10 years
Final: $19,671.51
$10,000 at 7% for 20 years
Final: $38,696.84
$10,000 at 7% for 30 years
Final: $76,122.55
$5,000 at 5% for 10 years
Final: $8,144.47
$25,000 at 8% for 15 years
Final: $79,304.23
$50,000 at 6% for 20 years
Final: $160,356.77
$100,000 at 10% for 25 years
Final: $1,083,470.59
$1,000 at 12% for 30 years
Final: $29,959.92
$50,000 at 4% for 10 years
Final: $74,012.21
$25,000 at 9% for 20 years
Final: $140,110.27
$5,000 at 3% for 5 years
Final: $5,796.37
$100,000 at 5% for 15 years
Final: $207,892.82