Compound Interest Calculator
Calculate how your investments grow over time with compound interest.
Compound Interest Calculator
Calculate how your investments grow over time with compound interest
About This Calculator
Project investment growth over time, including compounding effect and optional recurring contributions. It is one of the most useful ways to see how small rate or timing changes alter long-run outcomes—especially when you compare realistic best, base, and worst cases instead of a single guess.
Formula
A = P(1 + r/n)^(nt)
Example
10,000 at 8% annual, compounded monthly for 10 years gives A = 10000(1 + 0.08/12)^(12*10).
When to Use
- Long-term savings planning
- Retirement projections
- Comparing contribution strategies
Best Practices
- Use realistic return assumptions
- Model best/base/worst scenarios
- Review inflation-adjusted value for real purchasing power
FAQ
What does compounding frequency change?
More frequent compounding slightly increases final amount, all else equal.
Should I include inflation?
Yes for planning. Nominal gains can overstate real purchasing power.
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