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Compound Interest Calculator

Estimate future savings growth from an initial amount, regular contributions, interest rate and time.

Privacy: this tool processes your input in your browser unless clearly stated otherwise. Nothing is uploaded by this page.

About Compound Interest Calculator

Compounding scenarios help you understand how a starting balance and recurring contributions can grow over time.

How it works

The calculator models the starting amount, contribution, rate, frequency and duration you provide.

Important limitations

Real investments and savings products can have fees, taxes, changing rates and market risk.

Good practice

Frequently asked questions

Is this tool free to use?

Yes. It is provided as a free browser-based utility.

Do I need an account?

No account is required for ordinary use.

Can I rely on the result for an official decision?

No. Treat the result as an estimate or utility output and verify important decisions with the appropriate official source.

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See our Methodology & Editorial Standards for how tools are tested and explained.