The SWP Calculator is a simulation that shows you the monthly withdrawals from your mutual fund investments. It shows the total value of the mutual fund investment after the withdrawal. You may be able to get a regular income in retirement through the systematic withdrawal plan. The SWP Calculator consists of a formula box, where you enter the total investment amount, withdrawal per month, the expected annual rate of return, and the tenure of the investment. The SWP Calculator shows you the future value of your mutual fund investments.