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Compound Interest Calculator

Watch your money grow! Enter your principal amount, annual interest rate, time period and compounding frequency to see the maturity value and total interest earned — the magic of compounding explained.

Maturity amount
—
—Principal
—Interest earned
—Growth multiple
—Frequency
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How to use the compound interest calculator

  1. Enter your principal amount (initial investment).
  2. Enter the annual interest rate in percent.
  3. Enter the time period in years and pick a compounding frequency.
  4. Click Calculate Growth to see maturity amount and interest earned.

Compound Interest Calculator — FAQs

What is the compound interest formula?

A = P(1 + r/n)nt — where P is principal, r is annual rate, n is compounding frequency per year, and t is time in years.

How does compounding frequency affect returns?

More frequent compounding (monthly vs yearly) gives slightly higher returns because interest starts earning interest sooner.

What is the difference between simple and compound interest?

Simple interest is calculated only on the principal; compound interest is calculated on principal + accumulated interest, so money grows faster.

Is this financial advice?

No. ToolKishop's calculator is an informational estimating tool, not financial advice. Consult a qualified adviser for investment decisions.

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