Compound Interest Calculator

Result
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How this calculation works

What each input means

Principal (P) — Starting lump sum.
Rate % (r) — Annual interest rate entered as a percent.
Years (t) — Whole years the balance grows.

Formula used

Interest compounds once per year at the rate you enter:

A = P × (1 + r/100)^t

Does not model contributions, withdrawals, or intra-year compounding.

How this result is estimated

This compound growth calculator applies the formulas described on this page to the values you enter. Outputs are not financial, tax, legal, or medical advice.

Inputs are user-provided and may include rounding.
Where accuracy, eligibility, or obligations matter, rely on official disclosures and licensed professionals.

Last reviewed: 2026-04-17

Frequently asked questions

Is this calculator result exact?

It is an estimate based on your inputs and may differ from official or provider-specific calculations.

Does this site provide financial, tax, or legal advice?

No. Each tool applies explicit formulas to values you supply. Financial, tax, and legal conclusions belong with licensed professionals and official documents.

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