Investing calculator
Compound Interest Calculator
Project how a starting balance and regular monthly contributions may grow over time at a hypothetical annual return.
Compound Interest Calculator
Your result
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Enter your numbers to see a practical estimate.
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This saves only the relevant planning figures in this browser. Do not enter account numbers or card details.
How to use this result
Starting with $5,000 and adding $300 per month for 20 years at a hypothetical 7% annual return can produce substantially more than the total contributed.
Project how a starting balance and regular monthly contributions may grow over time at a hypothetical annual return.
This calculator provides a simplified educational estimate. It is not financial, tax, legal, investment, insurance or lending advice.
Questions answered
Compound Interest Calculator FAQ
Is the return guaranteed?
No. The result is hypothetical and actual investment returns vary and can be negative.
Does the calculator compound monthly?
Yes. It converts the annual return into a monthly rate for the estimate.
Should inflation be included?
For long-term planning, compare the result with an inflation-adjusted target as well.