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Investment Calculator

Last Updated: April 1, 2026 No Comments – < 1 min. read

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Starting Amount
Total Contributions
Interest Earned

End Amount – What will the final balance of an investment be?

Contribution Amount – What is the additional contribution needed to achieve a specified target?

Return Rate – What rate of return is needed to achieve a specified target?

Starting Amount – What starting amount is needed to achieve a specified target with specified contributions?

Investment Length – How long do I need to hold an investment do achieve a specified target?

Compound refers to the frequency of compounding. Continuously is most accurate for stock market returns, so that is the default.

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About John Williamson, APMA®

Analytical data nerd, investing enthusiast, fintech consultant, Boglehead, and Oxford comma advocate. I'm not a big fan of social media, but you can find me on LinkedIn and Reddit.

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