Simple Interest Calculator
Plan loans and savings with confidence using this simple interest calculator: choose any start and end dates, see accurate interest for the full period, and review a clear yearwise or monthwise breakdown before you decide.
How to use it
Enter the principal amount and annual interest rate.
Select your interest calculation frequency such as yearly, half-yearly, quarterly, or monthly.
Choose start and end dates using the From and To calendar fields.
Click "Calculate" to view duration cards, period interest, and total amount.
Use the breakdown sheet to review yearwise rows for long periods and monthwise rows for shorter periods.
Practical example
Input: Principal 100000, Rate 8%, Frequency: Quarterly, From: 01/01/2026, To: 30/06/2027
Output: Total days, weeks, months, interest per selected frequency, total interest for the period, and total amount with a period-wise breakdown table.
Frequently asked questions
Does it include compounding? No, this tool uses simple interest.
Can I calculate interest for custom dates? Yes, select any valid start and end dates using the built-in calendars.
Can I use decimals? Yes, decimal values are supported for principal and rate.
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