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Interest Calculator
Compare simple vs compound interest on savings and loans.
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Results
Compound Total
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Compound Interest Earned
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Simple Interest Earned
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Simple Total
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How to use the Interest Calculator
Enter a principal, rate, time period and compounding frequency to compare how simple and compound interest grow your money.
Frequently Asked Questions
Simple interest is paid only on the original principal. Compound interest is paid on the principal plus accumulated interest, so it grows faster.
More frequent compounding earns slightly more. Daily compounding beats monthly, which beats annual — though the difference is small at low rates.