The recurring deposits (RD) are a popular investment instrument for many. They bring handsome returns with the least of the risks. The investments are made in regular intervals giving the people with low in hand capital at a time or salaried individuals the best choice to invest in. The interest rates may vary depending on the financial institution. The calculation of the interest involves the instalment amount, rate of interest promised, and the tenure for which the investments you make. How is Rd return calculated? The formula for this is A = P(1+r/n) ^ nt, where 'A' is the final amount received, 'P' is principal, 'r', annual interest rate, 'n', number of times interest compounded, and ‘t' for the tenure. However you need not to stress yourself with the numbers and look for a good RD calculator like that of shriram city providing accurate results. You can get the exact amount details you will potentially get as returns. This will assist you in planning your investments accordingly, with your goals in mind. In fact one can use the calculator as many times as one wants. It is really a time saver too. It is also quite easy to use and helpful in comparing the RD plans of different institutions. All in all the calculator will assist you in making informed and smart decisions apart from just calculating the returns you will get.