This calculator takes your household income number, years until retirement and
calculates your asset salary ration (ASR)
and also the ratios you should be
aiming for to insure either 70% or 90% of your current income.
These numbers
come from
a document from TIAA-CREF who recently e-mailed me with the
information.
They did not have a calculator like this on their site so I
created one myself, because I can!