Central Tools

Free Compound Interest Calculator - Calculate Investment Returns

Calculate compound interest on your investments instantly. Free online calculator to see how your money grows with different compounding frequencies.

Compound Interest Formula

A = P(1 + r/n)^(nt)

A = Final amount

P = Principal amount

r = Annual interest rate (decimal)

n = Number of times interest is compounded per year

t = Time in years

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How to use Free Compound Interest Calculator - Calculate Investment Returns

1

Enter your initial investment amount

2

Input the annual interest rate

3

Set the investment duration in years

4

Choose compounding frequency

5

View your final amount and interest earned

Why use this tool?

Investment Growth

See how your money grows over time

Compare Frequencies

Test different compounding periods

Goal Planning

Plan for financial goals

Free Compound Interest Calculator - Visualize Your Wealth Growth

Discover the "eighth wonder of the world"—compound interest. Our future value calculator shows you how your initial investment grows when interest is reinvested over time. Factor in regular monthly contributions and see the exponential impact of time on your savings. Perfect for planning long-term wealth and retirement.

Quick How-To Guide

  1. 1Enter your "Initial Balance" (the amount you have saved now)
  2. 2Set the "Annual Interest Rate" you expect to earn
  3. 3Enter the "Number of Years" you want to let the money grow
  4. 4Add any "Monthly Contribution" you plan to make
  5. 5Select the "Compounding Frequency" and view your future total wealth

Why use our tool?

Flexible compounding—calculate for Daily, Monthly, Quarterly, or Yearly compounding
Monthly contributions—include regular additions to your savings for accurate results
Visual growth path—interactive chart shows the "Interest" vs "Principal" components
Reverse goal seeking—determine how much you need to save to reach a specific target
Table view—month-by-month and year-by-year breakdown of your balance
100% Client-side—your financial data stays in your browser; zero server interaction

Frequently Asked Questions

Find answers to common questions about using our tool, its features, and how it handles your data privacy.

Compound interest is the interest on a loan or deposit calculated based on both the initial principal and the accumulated interest from previous periods. It allows your money to grow exponentially because you are earning interest on your interest.
The Rule of 72 is a quick way to estimate how long it take to double your money. Divide 72 by your annual interest rate. For example, at a 6% interest rate, your money will double in roughly 12 years (72/6).
The more frequently interest is compounded, the higher your final balance will be. Daily compounding results in slightly more wealth than monthly compounding, which is better than yearly compounding. Most savings accounts compound monthly or daily.
Yes! This tool is perfect for estimating the future value of retirement accounts. Just input your current balance, your monthly contribution, and an average stock market return (traditionally 7-10% before inflation).
Absolutely. Because of the exponential nature of compounding, starting 10 years earlier with a smaller amount often results in more wealth than starting later with much larger contributions. Time is the most important factor in this equation.
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