📈 Savings & Investing

Compound Interest Calculator

Estimate how a lump sum may grow over time with compound returns.

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Enter your assumptions

Edit any field and calculate again to compare scenarios.

Estimated future value
Principal
Estimated growth
Total growth
Period
Results depend on your inputs and assumptions. They are not investment, lending, legal, tax, or other professional advice.
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What is compound growth?

Compounding means previous gains remain in the calculation base for future periods. This tool assumes a constant return for illustration; real investment returns fluctuate.

How should you use the result?

Try at least three scenarios: conservative, base, and optimistic. Interest rates, returns, income, and expenses can all change over time.

Is my data uploaded?

In this version, calculator inputs are processed directly in your browser and are not required to be sent to the website server.