Compound Interest Calculator
See how your investments grow with the power of compound interest.
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Principal Contributions Interest
Compound Interest Formula
A = P(1 + r/n)^(nt) A = Final amount (future value)
P = Principal (initial investment)
r = Annual interest rate (as decimal)
n = Number of times compounded per year
t = Time in years
Compounding Frequency Comparison
$10,000 at 7% annual rate for 10 years
| Frequency | Future Value | Interest Earned |
|---|---|---|
| Annually | $19,671.51 | $9,671.51 |
| Quarterly | $19,897.89 | $9,897.89 |
| Monthly | $20,096.61 | $10,096.61 |
| Daily | $20,137.53 | $10,137.53 |
Често задавани въпроси
What is compound interest?
Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. It makes your money grow faster than simple interest.
How does compounding frequency affect returns?
The more frequently interest compounds (daily vs monthly vs annually), the more total interest you earn. Daily compounding yields slightly more than monthly, which yields more than annual.
What is the Rule of 72?
The Rule of 72 is a quick way to estimate how long it takes to double your money. Divide 72 by the annual interest rate. At 8%, money doubles in approximately 9 years.