On the days that they worked in 2006, employed men worked about an hour more than employed women, on average.
The difference partly reflects women's greater likelihood of working part time. However, even among full-time workers (those usually working 35 hours or more per week) men worked slightly longer than women—8.4 versus 7.7 hours.
Among part-time workers, men averaged 5.1 hours on days they worked and women averaged 5.4 hours.
Bureau of Labor Statistics, U.S. Department of Labor, The Economics Daily, Average hours of work of men and women, 2006 at https://www.bls.gov/opub/ted/2007/jul/wk1/art01.htm (visited August 19, 2022).