Calculate how your money grows with compound interest. See the power of compounding with regular contributions and different compounding frequencies.
Future Value
$300,851
Total Interest
$170,851
131% return
Enter your starting amount
Set your recurring deposit amount
Configure rate and compounding frequency
Visualize your investment growth
Detailed annual projections
| Year | Start | Contrib. | Interest | End Balance |
|---|---|---|---|---|
| 1 | $10,000 | $6,000 | $919 | $16,919 |
| 2 | $16,919 | $6,000 | $1,419 | $24,339 |
| 3 | $24,339 | $6,000 | $1,956 | $32,294 |
| 4 | $32,294 | $6,000 | $2,531 | $40,825 |
| 5 | $40,825 | $6,000 | $3,148 | $49,973 |
| 6 | $49,973 | $6,000 | $3,809 | $59,782 |
| 7 | $59,782 | $6,000 | $4,518 | $70,299 |
| 8 | $70,299 | $6,000 | $5,278 | $81,578 |
| 9 | $81,578 | $6,000 | $6,094 | $93,671 |
| 10 | $93,671 | $6,000 | $6,968 | $106,639 |
Showing first 10 of 20 years
Compare different compounding options
| Frequency | Future Value | Total Interest | Difference |
|---|---|---|---|
| Annually | $284,670 | $154,670 | - |
| Quarterly | $297,755 | $167,755 | +$13,085 |
| Monthly | $300,851 | $170,851 | +$16,181 |
| Daily | $302,374 | $172,374 | +$17,704 |
See how time amplifies your returns
$106,639
After 10 years
+$36,639 interest
$300,851
After 20 years
+$170,851 interest
$691,150
After 30 years
+$501,150 interest
See how interest rate changes affect your final balance
Future Value
$300,851
100.0% complete
$300,851
of $100,000
2x
$20,000
Doubled your money!
3x
$30,000
Tripled!
5x
$50,000
Five times growth!
10x
$100,000
10x - Amazing growth!
Goal Achieved!
Congratulations on reaching your target!
2x
$20,000
3x
$30,000
5x
$50,000
10x
$100,000
See how different strategies affect your wealth
2 insights based on your inputs
With 20 years, compound interest works hard for you. The last 10 years will earn more than the first 10 years combined!
At 7% return, your money doubles every 10.3 years. In 20 years, you'll double 1 times!
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Calculate future value
Compound interest is interest earned on both your initial principal and accumulated interest. Use the formula A = P(1 + r/n)^(nt) where P is principal, r is annual rate, n is compounding frequency, and t is years. Our calculator at practicalwebtools.com shows exactly how your money grows with different rates, terms, and contribution schedules.
Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. Unlike simple interest, compound interest grows exponentially because you earn interest on your interest. This is why it's often called the "eighth wonder of the world."
More frequent compounding leads to higher returns. Daily compounding produces slightly more than monthly, which produces more than annual. For example, $10,000 at 5% for 10 years yields $16,289 with annual compounding vs $16,470 with daily compounding.
The Rule of 72 is a quick way to estimate how long it takes to double your money. Divide 72 by your interest rate to get the approximate years. At 6%, your money doubles in about 12 years (72/6=12). At 12%, it doubles in about 6 years.
Time is the most powerful factor in compound interest. Starting 10 years earlier can nearly double your final amount. A $500/month investment at 7% for 40 years grows to $1.2M, but for only 30 years, it's just $567K - less than half.
APR (Annual Percentage Rate) is the simple interest rate without compounding. APY (Annual Percentage Yield), also called effective annual rate, includes compounding and shows the actual yearly return. APY is always equal to or higher than APR.
Future Value
$300,851
Total Interest
$170,851
131% return