Compound Interest Calculator
Calculate how your savings grow with compound interest. Adjust principal, rate, time, compounding frequency, and additional contributions.
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About the Compound Interest Calculator
Compound interest is interest earned on both your principal and on previously earned interest. Over long horizons, compounding is the engine behind nearly all wealth accumulation in savings, investing, and retirement accounts.
More frequent compounding (monthly vs. annually) modestly increases the final balance. Regular contributions, however, dramatically change the outcome — even small amounts added consistently can dominate the result.
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