How this calculator works
The Academy of Motion Picture Arts and Sciences has presented a Best Picture award at every ceremony since 1929, so a complete marathon is a little under one hundred films at the time of writing. Multiplying the number of films by an average runtime gives the total viewing time, and dividing by the time you can give each day gives the number of viewing days, rounded up. The finish date counts calendar days from the start, including the first day. The runtime is an input rather than a fixed list because winners range from around 90 minutes to well over three hours, and the average of your own shortlist is more useful than a national average.
Formula
Total runtime = number of films x average runtime. Viewing days = total runtime / viewing time per day, rounded up. Finish date = start date + (viewing days - 1) calendar days.
Worked example
Ninety seven winners at an average of 130 minutes is 12,610 minutes, or 210.2 hours. At three hours a day that is 71 viewing days, so a marathon starting on 1 November finishes on 10 January.
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Frequently asked questions
How many Best Picture winners are there?
One per ceremony since 1929, which is 97 winners for the ceremonies up to and including 2025. The count rises by one each year, so update the film count if you are working from a newer ceremony.
Why not list every winner and its runtime?
Runtimes vary between cuts and releases, and a long fixed list would be out of date as soon as a new winner is named. Starting from a count and an average keeps the calculator accurate for any selection, from the last ten winners to the whole run.
What average runtime should I use?
About 130 minutes is a reasonable starting point for the full list, but winners are not uniform. If you are watching a run of epics, raise it; if you are picking shorter winners, lower it. The total scales in a straight line with the average.
Does the schedule include rest days?
No. It assumes you use your full daily viewing time every day. If you only watch on weekends, enter the weekly number of hours divided by seven, or set the viewing time to the average across the whole week.