Simple Interest Calculator
Calculate simple interest and the total repayable amount for a loan or deposit where interest is charged on the original principal only.
Principal (₹)
Rate (% per year)
Time (years)
Principal
₹1,00,000
Simple interest
₹30,000
Total amount
₹1,30,000
Formula: SI = P × R × T ÷ 100. Interest is charged only on the original principal.
Related tools
- SIP CalculatorFuture value of a monthly mutual-fund SIP, with optional step-up.
- Lumpsum Investment CalculatorFuture value of a one-time investment at a compound rate.
- FD CalculatorFixed-deposit maturity value with quarterly compounding.
- RD CalculatorRecurring-deposit maturity from a fixed monthly deposit.
- PPF Calculator15-year Public Provident Fund maturity and yearly balance.
Free to use, no sign-up. Calculations run in your browser — nothing you type is sent to a server. These tools are for general information only, not professional advice. See the full tool list.