💰 Finance

Simple Interest Calculator

Calculate simple interest, total amount and earned interest using the SI formula. Compare the result with compound interest to see the difference.

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Fill in principal, rate and time to see the result.

Simple Interest Formula

I = P × r × t     A = P + I

Where I is interest, P is principal, r is the annual rate (as decimal), and t is time in years. Simple interest does not compound: you earn the same amount of interest each period.