"In order to get a good understanding of the purchasing power of your future retirement savings for today, you can do a “simple” calculation: Take your total retirement savings and multiply it by 3%. For example, if you have $1.25m (retirement savings), multiplied by 0.03% (inflation), you get $45,000 in inflation. Then you subtract that number from your total savings: $1.25m - $45k = $880k. This will give you a baseline to understand your financial situation."

Yeah, so $1.25m - $45K is NOT 880K.

Also, the effect of inflation compounds every year. So maybe you want to divide the nominal answers you are giving out by (1.03)^num-years-from-today to get the real value (in today's dollars) .

Please do better math.