So, how do the hours stack up across various generations and time periods in history — both in the U.S. and the U.K.? While each group had its own estimated methodology, here’s the amount of working hours various groups listed in the research had, from least to most: Casual laborer, U.K. (14th century): 1,440 hours Adult male peasant, U.K. (13th century): 1,620 hours Average worker, U.S. (2015): 1,811 hours Manufacturing workers, U.K. (1988): 1856 hours Average worker, U.S. (1987): 1,949 hours Farmer-miner, adult male, U.K. (1400-1600): 1,980 hours English worker (Middle Ages): 2,309 hours