These are conservative figures. They don’t factor in any entertainment or travel, which would make for a pretty grim retirement. Nor do they take into account how inflation might cut into purchasing power as we age. Inflation can take a bigger bite for seniors, because medical costs, which may account for a bigger chunk of expenses, have an inflation rate significantly higher than that for the broad economy.   Health-care costs for retirees will rise at an average annual rate of 5.5 percent over the next decade, according to HealthView Services, which makes retirement health-care cost projection software. To put that in perspective, from 2012 to 2016, the average annual broad inflation rate in the U.S. was 1.9 percent.

https://www.bloomberg.com/news/articles/2017-08-21/how-far-does-1-million-savings-go-in-retirement-state-by-state