Compound Interest Calculator

Calculate future value, interest earned, and view growth over time. Use recurring contributions for a more realistic forecast.

Initial Principal (P) Annual Interest Rate (%) Compounding Frequency Contribution (each period) Contribution Timing

Start Date End Date (or Years)

OR Enter number of years

Show breakdown

How this works

Compound interest is interest calculated on the initial principal and also on the accumulated interest of previous periods. This calculator supports periodic contributions and different compounding frequencies. For background on compound interest visit Compound interest (Wikipedia).

Tips: use monthly compounding for bank-like scenarios, use contributions at start of period for salaries paid at beginning. Want ROI or Profit Margin calculators? Try ROI Calculator or Profit Margin Calculator.

What Is Compound Interest?

Compound interest is the process of earning interest not only on your initial principal but also on the interest that accumulates over time. It is one of the most powerful financial concepts in investing, saving, and long-term wealth growth. Unlike simple interest, compound interest can grow exponentially because the returns continue to build on themselves.

For a deeper explanation, you may explore the concept on Wikipedia – Compound Interest.

Why Use a Compound Interest Calculator?

A compound interest calculator helps you estimate how your money grows over time based on:

Initial principal amount
Annual interest rate
Compounding frequency (daily, monthly, quarterly, yearly)
Additional contributions (monthly or yearly)
Total investment time

Our advanced Compound Interest Calculator gives you instant results along with charts, breakdowns, and projections. This makes it easier for students, investors, and business owners to understand how compounding truly works.

How Compound Interest Works

The basic formula for compound interest is:

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

P = Initial principal
r = Interest rate (decimal)
n = Number of compounding periods per year
t = Number of years
A = Final amount

Our calculator performs this automatically and displays results in a clean, easy-to-understand layout.

Features of This Compound Interest Calculator

Real-time calculations as you adjust values
Advanced options: extra contributions, flexible compounding periods, inflation adjustment
Pie chart & line graph showing growth over time
Investment summary with a year-by-year table
Clear explanation of principal vs interest earned
Download options (PDF, CSV if needed)

Practical Examples

Example 1: Basic Compounding

You invest $10,000 at 8% interest compounded yearly for 10 years. Without adding any extra deposits, the calculator shows:

Total Value: $21,589
Total Interest Earned: $11,589

Example 2: Monthly Contributions

Investing $100/month for 5 years at 6% interest compounded monthly gives:

Total Value: $6,977
Total Contributions: $6,000
Total Interest: $977

Internal Links – More Useful Tools

If you’re working on financial planning, you may also find these calculators helpful:

Final Thoughts

Compound interest is one of the strongest tools for building long-term wealth. Whether you’re saving for retirement, investing in stocks, or just learning financial basics, understanding compounding gives you a major advantage.

Use this calculator anytime you want quick, accurate forecasts of your investment growth. It’s free, easy to use, and designed for both beginners and advanced users.