Compound Interest Calculator with Monthly Contributions

Use this free compound interest calculator to estimate investment growth, calculate future value, and understand how compounding increases your wealth over time.

Investment Details

Investment Growth

Future Value:

Total Contributions:

Total Interest:

Year-by-Year Breakdown

Year Balance

Compound Interest Explained

Compound interest allows investments to grow faster because interest is calculated on both the original principal and previously earned interest.

Compound Interest Formula

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

How to Use This Calculator

  1. Enter your initial investment.
  2. Input the expected interest rate.
  3. Select investment years.
  4. Add monthly contributions.
  5. Click calculate to see results.

Compound Interest Example

If you invest $10,000 with a 7% annual interest rate for 10 years, compound interest significantly increases your investment value over time.

Frequently Asked Questions

What is compound interest?

Compound interest is interest calculated on the principal and accumulated interest.

Why is compound interest powerful?

It helps investments grow faster because interest earns additional interest.

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