// multi-utility computation suite · offline · instant · precise
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math.finance-simple-interest Calculator
Calculates simple interest and total amount due from principal, annual rate, and time. Simple interest is linear in time — compound interest grows exponentially — this makes the difference explicit.
Inputs
P
Original borrowed or invested amount before interest. Interest accrues on the outstanding principal balance.
R
Yearly rate as a percentage. The calculator converts this to the appropriate period rate automatically.
T
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Results
interest
Sample size or count used in the calculation.
total
The combined total across all inputs and components.