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Illustration representing a Compound Interest Calculator, featuring a large calculator, a money plant in a pot, stacked coins, and a rising graph to symbolize financial growth.

Compound Interest Calculator

Use our Compound Interest Calculator to estimate your investment growth over time. Simple, fast, and free—perfect for planning savings or retirement.

AJ Sheff
Created byAJ Sheff
Updated Jun 4, 2025

Quick Scenarios

Financial Goal

Your target amount to reach
$

Basic Parameters

The amount of money you're starting with
$
How much you plan to add each year
$
Expected yearly return percentage (stock market average is ~7-10%)
%
How many years you plan to invest
years
Investment Pro

Final Portfolio Value (Minus Withdrawals)

$682,560

After 30 years

You're $317,439.2 short of your goal. Try increasing your contributions or investment period.

Key Milestones

You'll double your money by year 2

Growth Over Time

Compound Interest Over Time
30 years
Don't forget...Investing is very important for wealth generation

Year-by-Year Breakdown

Understanding Compound Interest

What is Compound Interest?

Compound interest is earning interest on both your original investment and previously earned interest. It's often called "interest on interest" and is the key to long-term wealth building.

How Does It Work?

Each year, your investment grows by the return rate. Next year, that growth also earns returns. This creates exponential growth over time, especially with regular contributions.

Why Should You Care?

Starting early gives compound interest more time to work. Even small amounts can grow significantly over decades, helping you reach financial goals like retirement, education, or major purchases.