Axioma offers you a simple calculator to assess your saving needs in order to get the monthly income required at retirement.
To use this calculator, you should specify your current age. If you are married and you have a working spouse, you should specify your spouse age. The accepted range of age is between 18 and 65.
If you are single or your wife does not work you do not have to specify data in the spouse column.
To make this exercise easy and let you use amounts in current (today's) dollars, we have fixed the inflation rate to 3%.
N.B.: To maintain your standard of living you will need 60 to 70% of your current family income.