For office workers in general, 3 is typical. https://www.inc.com/melanie-curtin/in-an-8-hour-day-the-average-worker-is-productive-for-this-many-hours.html http

For office workers in general, 3 is typical. https://www.inc.com/melanie-curtin/in-an-8-hour-day-the-average-worker-is-productive-for-this-many-hours.html https://www.inc.com/melanie-curtin/in-an-8-hour-day-the-aver... Has held true at all 7 jobs I have ever had.