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Compound Interest Calculator — With Deposits

Compound interest with any frequency plus recurring deposits — future value, interest and contributions. Client-side.

Free No signup Client-side Privacy friendly Updated

How to use

  1. 1 Enter your principal, annual interest rate, number of years and compounding frequency.
  2. 2 Optionally add a recurring deposit per compounding period.
  3. 3 See the future value, total interest, and how much you contributed.

Why use this tool

  • Compound interest with any frequency, plus recurring deposits.
  • Separates growth from interest from your contributions.
  • Runs entirely in your browser.

Frequently asked questions

What is the compound interest formula?

A = P(1 + r/n)^(nt), where P is the principal, r the annual rate, n the compounding frequency, and t the number of years.

How are recurring deposits included?

Each deposit grows for the remaining periods: the future value of the deposit stream is added using FV = d·((1+i)ⁿ − 1)/i, with i = r/n.

What does compounding frequency change?

More frequent compounding (e.g. daily vs annually) earns slightly more, because interest is added — and itself earns interest — more often.

Is this financial advice?

No — it’s a calculator. Actual returns vary, and it ignores taxes, fees and inflation.

What is Compound Interest Calculator?

A compound interest calculator projects the future value of savings using A = P(1 + r/n)^(nt), optionally adding recurring deposits, and shows how much of the growth is interest.

Summary

Compound Interest Calculator is a free finance utility by Zerethon Tools. Compound interest with any frequency plus recurring deposits — future value, interest and contributions. Client-side. Runs entirely in the browser — no signup, no upload.

Category
Finance
Pricing
Free
Privacy
Browser-based
Signup
Not required

Privacy

Your data never leaves your browser unless explicitly stated. Compound Interest Calculator runs entirely client-side — no server upload, no logging, no tracking of your input.

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