Simple Interest Calculator
Calculate simple interest, total amount and interest earned over any period.
How simple interest is calculated
I = P ร r ร t where P is the principal, r is the annual interest rate (as a decimal), and t is the time in years.
Frequently Asked Questions
Is the Simple Interest Calculator free to use?
Yes, the Simple Interest Calculator is 100% free to use. There are no subscriptions, no sign-ups, and no hidden fees.
Is my data safe when using the Simple Interest Calculator?
Absolutely. All calculations performed by the Simple Interest Calculator happen locally in your web browser. We do not store, track, or transmit your inputs or results to any server.
How accurate is the Simple Interest Calculator?
Our Simple Interest Calculator uses industry-standard formulas and methodology. You can view the exact formula and calculation logic used in the methodology section above to verify the math yourself.
Can I use the Simple Interest Calculator on my mobile phone?
Yes! The Simple Interest Calculator is fully responsive and works seamlessly on all devices including smartphones, tablets, and desktop computers.