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Compound Interest Calculator

Calculate how your money grows over time with compound interest. See the power of reinvested earnings and plan your investments wisely.

Principal Amount Enter the initial amount you want to invest

Annual Interest Rate (%) Enter the annual interest rate as a percentage

Time Period Enter the time period for investment

Time Unit Select whether time period is in years or months

Compounding Frequency How often interest is compounded

Advanced Options

Additional Contribution Regular additional contributions (optional)

Contribution Frequency How often you make additional contributions

Start Date When you want to start investing

Final Amount

Principal

Total Interest

Total Contributions

Effective Rate

Total Periods

Year	Opening Balance	Contribution	Interest Earned	Closing Balance	Total Interest

This calculation assumes a fixed interest rate throughout the investment period.

Interest is compounded based on the selected frequency (annually, semi-annually, quarterly, or monthly).

The calculation does not include any taxes, fees, or charges that may apply to your investment.

Additional contributions are made at the specified frequency and amount.

Returns are reinvested and compounded at the same rate.

Compound interest is interest earned on both the principal amount and the accumulated interest from previous periods.

More frequent compounding (monthly vs annually) results in higher returns due to interest being reinvested more often.

Formula: A = P(1 + r/n)^(nt) where A = final amount, P = principal, r = rate, n = compounding frequency, t = time.

Additional contributions are added to your investment at the specified frequency and also earn compound interest.

Simple interest is calculated only on the principal, while compound interest is calculated on principal plus accumulated interest.