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Compound Interest & ROI Calculator

Enter principal, annual rate, years, and compounding. Optionally add regular contributions. QA: running…

Principal

Annual Interest Rate (% APR)

Years

Compounding

Contribution Amount

Contribution Frequency

Contribution Timing

Locale (number format)

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Show per-year breakdown

Year	Start Balance	Contribs This Year	Interest This Year	End Balance

Educational use only · Offline-capable