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Compound Interest Calculator

Calculate how much your investments can grow over time through the power of compound interest.

Inputs

Initial Investment ($)

Monthly Contribution ($)

Years to Grow

Estimated Annual Interest Rate (%)

Future Investment Value

$0.00

Compounded annually based on your inputs.

Total Principal Deposited

$0.00

Total Interest Earned

$0.00

📖 How to Use This Calculator

See the power of compounding in action. This calculator shows how your initial investment plus regular monthly contributions grow over time.

Initial Investment: Enter the amount you have today to invest.
Monthly Contribution: Set how much you can add each month (even $0 works).
Years: Choose your investment time horizon.
Interest Rate: Enter the expected annual return percentage.

Common Use Cases

Projecting retirement savings growth over 20-30 years
Comparing fixed deposit rates vs stock market returns
Showing the impact of starting to invest early vs late
Planning for a child's education fund

Pro Tip: The "Rule of 72" is a quick way to estimate doubling time. Divide 72 by your annual return rate. At 7%, your money doubles roughly every ~10.3 years.

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💡 About compound interest

Professional-grade compound interest tool designed for accuracy and privacy. Calcora provides expert-built utilities entirely free of charge with zero data collection.

All calculations happen instantly and locally within your browser, ensuring your data remains absolutely private.

❓ Frequently Asked Questions

Is my data stored on your servers?

No. Calcora tools run 100% client-side. No data is uploaded or stored on any external server.

Is this service free?

Yes, all tools on Calcora are completely free to use without any account or subscription.