Free Calculator
Interest Rate Calculator
Calculate the effective annual interest rate from your investment details
Investment Details
Principal Amount ($)
Final Amount ($)
Time Period (years)
Calculate Interest Rate
Your Results
Effective Rate
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Total Interest Earned
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Annual Return
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Simple vs Compound Interest
Simple Interest
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Compound Interest
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Compound vs Simple Difference
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How It's Calculated
Compound Rate = (Final / Principal)^(1/Years) - 1