Whole episodes, realistic sessions
Episodes per session = floor(session minutes ÷ runtime). Sessions = ceil(remaining episodes ÷ episodes per session). Approximate weeks = ceil(sessions ÷ viewing days per week). Total program minutes = episodes × runtime. It does not split a long episode across evenings. If the session cannot fit one episode, increase the time or choose a different plan.
An illustrative season
Eight 45-minute episodes total 360 minutes. A 100-minute session fits two complete episodes, so four sessions are needed. At three viewing days per week, allow about two weeks. Ten unused minutes per session are not extra program time. This is a capacity estimate, not a dated calendar.
What this cannot know
All episodes are assumed available before you start. Weekly releases, hiatuses, varied runtimes, ads, breaks, recaps, and leaving dates can change the plan. For varying lengths, use the longest runtime for a cautious estimate or plan episodes individually. Check the official episode list and availability deadline before scheduling a group watch.
Read the season planning guide. Use the release-time converter for an announced premiere.