Simple Interest Calculator
সরল সুদ ক্যালকুলেটর
Work out the interest and total amount on a principal at a fixed annual rate over a set period.
Assumptions used
- Interest is simple — calculated only on the original principal, never on accumulated interest.
- The rate entered is the annual interest/profit rate.
- Time is in years; decimals are allowed for partial years (e.g. 1.5 = 18 months).
Good to know
Simple vs compound interest
Most Bangladeshi bank deposits, DPS and Sanchayapatra use compound or periodic-profit methods rather than simple interest. Use this tool for short informal loans or quick back-of-envelope estimates.
Related calculators
Compound Interest Calculator
চক্রবৃদ্ধি সুদ ক্যালকুলেটর
Interest on principal plus accumulated interest, with any compounding frequency.
OpenEquivalent Compound Rate
সমতুল্য চক্রবৃদ্ধি হার
Convert a flat earning rate into its equivalent compound interest rate to compare offers.
OpenDPS Calculator
ডিপিএস ক্যালকুলেটর
Estimate the maturity and interest of a monthly Deposit Pension Scheme — or solve for the rate.
OpenFrequently asked questions
What is the simple interest formula?
Interest = (Principal × Rate × Time) ÷ 100, where rate is per year and time is in years. The total you get back is principal plus interest.
How is it different from compound interest?
Simple interest is always charged on the original principal only. Compound interest is charged on the principal plus the interest already earned, so it grows faster over time.
Results are estimates for general guidance only and are not financial advice. Rates, tax rules and product terms change — always confirm the latest figures with your bank or Bangladesh Bank / National Savings before making a decision.