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Simple Interest Calculator

Simple interest charges the stated annual rate on the original principal throughout the period. Interest does not earn additional interest in this calculation.

How it works

Simple interest charges the stated annual rate on the original principal throughout the period. Interest does not earn additional interest in this calculation.

Choose the right inputs

Enter time in months. Six months is treated as half a year, so a 12% annual rate becomes a 6% charge on the original principal for that duration.

Understand the output

The report separates earned or payable interest from the final principal-plus-interest amount. This helps compare a handwritten loan estimate against its basic arithmetic.

Use the result carefully

A reducing-balance instalment loan follows a different schedule. Processing fees, late charges and daily accrual conventions must be handled separately from this simple model.

Simple Interest Calculator FAQs

Uses principal × annual rate × months / 12. No compounding or lender fees are included.
INR 10,000 at 12% annually for 6 months incurs INR 600 simple interest and totals INR 10,600.
Enter time in months. Six months is treated as half a year, so a 12% annual rate becomes a 6% charge on the original principal for that duration. INR 10,000 at 12% annually for 6 months incurs INR 600 simple interest and totals INR 10,600.

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