💰 Compound Interest Calculator

See how your money grows over time

✓ Free Forever 📊 Visual Charts 🔒 100% Private
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years

Why Use Our Calculator?

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Compound Growth

See how compound interest accelerates your wealth.

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Monthly Contributions

Include regular contributions in calculations.

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Year-by-Year

View detailed breakdown by year.

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Flexible Compounding

Daily, monthly, quarterly, or annual.

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100% Private

All calculations in your browser.

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Always Free

No signup or limits.

Frequently Asked Questions

💰 About Compound Interest

What is compound interest?

Compound interest is interest calculated on both the initial principal and accumulated interest. It makes your money grow faster over time.

How often should interest compound?

More frequent compounding = faster growth. Daily compounding earns slightly more than monthly, which earns more than annually.

What's the Rule of 72?

Divide 72 by your interest rate to estimate years to double your money. At 7%, money doubles in about 10 years.

🔧 Using the Calculator

How do I use this calculator?

Enter your starting amount, monthly contribution, interest rate, and time period. Click Calculate to see your future value.

Is this calculator accurate?

Yes! We use the standard compound interest formula with contribution adjustments.