And you only have to figure it for a 401k, TSP, or IRA...retirement accounts where you have to initiate the payment.
For Pension $$ that you are already receiving monthly, and that you have no control over anymore? For those the RMD is whatever you receive for the year. Just the box 1 value of the 1099-R form. The payer of the pension has already made sure the $$ sent comply with the IRS RMD requirements..