The reader I used to get the page count from, is set up to use the same font, font size, and margins for all ebooks. So the page count should be comparable between the two books.

But since you mentioned word count…

• My edition of The Hobbit has 96,923 words.
• My edition of The Fellowship of the Ring has 192,625 words.

So by word count, The Fellowship of the Ring is almost twice as long as The Hobbit.

Adding in the other books of the Lord of the Rings:

• The Two Towers: 157,065 words.
• The Return of the King: 210,618 words.

That brings the whole Lord of the Rings Trilogy to a total of 560,308 words. Meaning that the Lord of the Rings trilogy is 5.8 times longer than The Hobbit…

Looking at the extended edition run times of the movies, The Lord of the Rings trilogy runs for 10 hours and 26 minutes. The Hobbit trilogy runs for 7 hours and 52 minutes. So in movie form The Lord of the Rings in only 32% longer than The Hobbit.

So there’s 67 milliseconds of Lord of the Rings movie, per word from the books, where as there’s 292 milliseconds of The Hobbit movie, per word from the book. That’s 4.4 times as much movie runtime per word in The Hobbit, than in the Lord of the Rings… Which is quite thinly stretched…

My ebook of The Hobbit is 217 pages. My ebook of The Fellowship of the Ring is 377 pages.

So the first book of the LOTR trilogy is 73% longer than the whole Hobbit book.