Most people spend nearly one hour per day slacking off at work, a new study ­reveals.

American employees spend an average of 34 to 50 minutes loafing — watching YouTube videos, snacking and gossiping — on the job each day, according to research from National Bureau of Economic Research.

Half of the wasted time was spent eating, the other on “leisure” activities, such as surfing the Web, chatting with co-workers and exercising, according to the study, which doesn’t count lunch break.

Researchers combed through more than 35,000 daily activity logs of workers and found people waste an average of 7 percent of the day not working at work.

The data was gathered between 2003 and 2012.