Fermi Estimate of Weekly Zoom Meeting Volume From Users and Meeting Habits

In a product manager interview, you are asked to estimate how many meetings take place on Zoom in an average week. Lay out your approach, label each assumption, do the arithmetic, and finish with a number and a range you would stand behind. ```hint Meetings are not people Most of what you can reason about is people and how often they get on calls. Before multiplying anything, decide how those individual habits become a count of distinct meetings. ``` ### Clarifying Questions - Does every Zoom session count, including one-on-one calls, webinars and online classes, or only meetings at work? - Should the estimate be worldwide, or for a single market such as the United States? - Are we counting distinct meetings, or participant joins, where a meeting with five attendees counts five times? - Does an average week mean a normal working week outside holiday periods? ### What a Strong Answer Covers - A stated definition of a meeting and a clear scope. - A structured equation split into sensible segments, such as work, education and personal or community use, with every input labeled as an assumption. - A correct step from individual participation to distinct meetings, and an explicit allowance for competing meeting tools. - Clean arithmetic ending in a point estimate and a range driven by the least certain inputs. - A sanity check from an independent angle or a known public reference point. ### Follow-up Questions - Which single assumption moves your answer most, and what data inside Zoom would you use to pin it down? - How would your estimate change for a week in spring 2020, when offices and schools first went remote? - How would you turn your answer into an estimate of total meeting minutes per week?