I estimate that, with reasonable assumptions, one's total savings should equal savings rate times years of saving. This might sound high after quite a few years working (with increasing pay and savings rate), but it works out as stock appreciation adds to principle. There are a thousand exceptions to this (school loans, divorce, fluctuating income and savings rates, etc) but as a general rule I am proposing it.
This works for me and for a buddy who has worked 30 years. Does it work for you?
E.g. if you have worked 10 years, currently save 25% and earn $100K, I estimate you have $250K saved. Am I close?