I posted a simple graph on Twitter comparing the U.S. box office gross of It (2017) with that of The Exorcist (1973), showing both unadjusted dollars and dollars adjusted for ticket price. (The data came from Box Office Mojo .) My tweet was a response to the news story that It has outgrossed The Exorcist, making the new Stephen King adaptation the highest-grossing R-rated horror movie of all time, by U.S. box office. While the news stories did point out that the record is not adjusted for inflation, I thought it would be interesting to see just how much of a different inflation makes. Obviously, inflation makes a huge difference. Box Office Mojo adjusts for ticket price, not the overall value of the dollar, so it is more directly relevant to movie grosses. The Exorcist has grossed $232,906,145 in the U.S. (this includes re-releases, which complicate things, but I will gloss over that fact). How many people saw The Exorcist in a movie theater? In 1973, the average movie ticket ...