Business professionals in Europe and the US waste about five hours each week arranging and re-arranging meetings and conference calls.

What’s more, they pass countless more hours at meetings that are an average of 2.75 hours long, according to a meeting-planning study from Doodle (via MarketingCharts).

The study, found that at least an eighth of an average working week is spent arranging meetings and conference calls.

Business professionals organize seven meetings a week on average, with the mean length of each being two hours 45 minutes.

Most meetings have at least four or five participants.

Across Europe and the US, administrative staff use calendar systems (34%) more than managers (27%). On the other hand, managers prefer email (34%) to arrange meetings more than administrative staff (30%).

Managers typically need to rearrange more meetings than their assistants, with 69% of managers needing to reschedule get-togethers compared with less than half (46%) of admin pros.