Compound Interest Calculator
Frequently Asked Questions
What is compound interest?
Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods:
- Your money earns interest on top of interest
- The more frequently interest compounds, the faster your money grows
- It creates exponential growth over time
- Albert Einstein reportedly called it the "eighth wonder of the world"
How is compound interest calculated?
The compound interest formula is A = P(1 + r/n)^(nt), where:
- A = Final amount (future value)
- P = Principal (initial investment)
- r = Annual interest rate (as a decimal)
- n = Number of times interest compounds per year
- t = Number of years
How does compound frequency affect growth?
Higher compound frequency results in slightly more growth:
- Daily compounding yields slightly more than monthly
- Monthly compounding yields more than quarterly
- The difference is most noticeable with higher interest rates
- For most investments, monthly vs daily difference is minimal
Why are regular contributions important?
Regular contributions significantly boost your investment growth:
- Each contribution starts earning compound interest immediately
- Consistent investing averages out market fluctuations
- Small monthly amounts can grow into substantial sums
- Starting early maximizes the power of compounding