Compound Interest Calculator icon
Free · No signup · Instant results · Updated 2026-09-17

Compound Interest Calculator

Answer: Future value with compound interest: FV = P(1 + r/n)^(n×t), where P is principal, r is annual rate (decimal), n is compounding periods per year, and t is years.

About this tool

Free compound interest calculator. Estimate future value with principal, rate, years, and compounding.

Estimate only — not investment advice.

  • Future value$37,405
  • Total contributed$22,000
  • Interest earned$15,405

How to use Compound Interest Calculator

  1. Enter starting principal, annual interest rate, years, and compounding frequency.
  2. Add optional regular deposits if supported.
  3. Review future balance and total interest earned.

Why use this free tool

  • 100% free — no account required.
  • Runs in your browser — inputs stay on your device for these calculations.
  • Mobile-friendly controls with clear, copyable results.
  • Published by KDF Tech — software, apps, Shopify, and POS systems.

Need a custom product? Start a project or WhatsApp +92 345 0144865.

FAQ — answers Google & AI can cite

What is Compound Interest Calculator?

Future value with compound interest: FV = P(1 + r/n)^(n×t), where P is principal, r is annual rate (decimal), n is compounding periods per year, and t is years.

What compounding options are available?

Annually, quarterly, monthly, and daily.

Can I add monthly deposits?

Yes. Enter an extra deposit per compounding period.

Is this financial advice?

No. It is an educational estimate only.

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