PALLAS / CALCULATOR
Simple Interest Calculator
Calculate interest from the original principal only, with no compounding. The annual rate and term stay explicit so the result can be audited directly.
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Method & formula
Simple interest is calculated only on the original principal. Interest from earlier periods is not added to the principal for later periods.
- Interest = principal × annual rate × time in years
- Total amount = principal + interest
Example
10,000 at 5% simple interest for 5 years produces 2,500 of interest and a total of 12,500.
Sources & standards
FAQ
Is this compound interest?
No. Interest is calculated from the original principal only.
Can real products calculate interest differently?
Yes. Day-count conventions, payment timing, fees and product terms can differ. This calculator models the stated simple-interest formula only.