Simple Interest Calculator
Calculate SI, find the rate, principal, or time — 4 modes
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Simple Interest
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Principal
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Total amount
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Rate
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Time
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SI = P × R × T / 100
Simple Interest vs Compound Interest
What is simple interest?
Simple Interest (SI) = Principal × Rate × Time / 100. Interest is calculated only on the original principal, not on accumulated interest. It is used in short-term loans, some fixed deposits, and government schemes.
When is simple interest used?
Simple interest is used for short-term personal loans, car loans (sometimes), some RD accounts, and treasury bills. Most bank FDs and investments use compound interest, which gives higher returns.
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