Use this simple interest calculator to find A the Final Investment Value using the simple interest formula. This means that you do not re-lend or reinvest the interest. The Simple Interest Formula Simple Interest Simple Interest Math Word Problem Worksheets If you have a loan the interest will increase the amount you owe based upon the interest rate charged by the bank. . Subtract the initial principal if you want just the interest figure. With just three values we can see what an amount invested today will be worth in the future. Work out the interest for the first period add it on and then. Here is the step by step approach for the calculation of Accrued Interest. Finally the formula for simple interest can be derived as a product of outstanding loan amount step 1 interest rate step 2 and tenure of the loan step 3 as shown below. The simple interest formula is. The future value with simple interest is the...