Compound Interest Calculator

Calculate compound interest, future value of investments, and savings growth

Investment Details

Initial Investment ($)

Monthly Contribution ($)

Annual Interest Rate (%)

Investment Period (Years)

Compound Frequency

Adjust for Inflation

Quick Scenarios

Investment Growth Results

Final Amount

Total Interest Earned

0% of final amount

Investment Summary

Total Contributed

Effective Annual Rate

Years to Double

Avg Monthly Growth

Investment Composition

Initial Investment

Monthly Contributions

Interest Earned

Year-by-Year Growth

Year	Starting Balance	Contributions	Interest	Ending Balance

Showing first 10 years

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Enter investment details to calculate

Fill in your initial investment, contributions, and return rate above

Compound Interest Calculator FAQ

What is the difference between annual and monthly compounding?

Monthly compounding applies interest twelve times a year, so interest starts earning interest sooner. Over long periods, more frequent compounding produces noticeably higher returns than annual compounding at the same nominal rate.

How do I include regular monthly contributions?

Enter the contribution amount and choose monthly frequency. The calculator adds each deposit at the start or end of the period you select and compounds it together with your principal.

Does the calculator account for taxes and inflation?

No. Results show gross compound growth. For real-world planning, compare the final amount against expected inflation, and check whether your interest is taxable in your jurisdiction.

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