Compound Interest Calculator
See how an initial amount plus regular monthly deposits grows over time at a given interest rate.
How to use the compound interest calculator
- Enter your starting balance and monthly deposit.
- Enter the yearly rate and number of years.
- Check the final balance and how much came from interest.
Frequently asked questions
What is compound interest?
Interest earned on both your original money and on the interest already added, so growth speeds up over time.
What is the compound interest formula?
A = P(1 + r/n)^(nt), where P is the principal, r the yearly rate, n the compounding periods per year and t the years.
Does this guarantee returns?
No. It is a projection at a fixed rate. Real investment returns vary and can be negative.
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