are you estimating your your future spouse 's , widow 's , or widower 's benefits under the GPO?
Yes I am
You will need two things: The estimated " gross " monthly amount of your pension from your government job not covered by Social Security . and The estimated monthly amount of your Social Security benefit as a spouse , widow , or widower before the effect of GPO .
How do I know what my spouse's benefit will be if I retire at full retirement age?
If your spouse already receives benefits  ask them what their benefit would be if it started at their full or normal retirement age . Divide this amount in half and round down to the nearest dollar .This is your estimated spouse 's benefit if you retire at full retirement age .
and how would I know how my government pension will affect my benefits?
To get a more accurate estimate of how the government pension you will receive for work not covered by Social Security will affect the part of your benefit based on your spouse 's work : Enter the estimated " gross " monthly amount of the government pension in today 's dollars you will receive for work not covered by Social Security in Step # 1 of " Calculate Your Benefits ." Use your most recent estimate to determine your estimated retirement benefit based on your own earnings .
will my own earnings affect whether or not I'll be eligible for a Social Security benefit?
We will need more info from you