A reader writes to ask:
I read somewhere that if you format properly you should get 25 lines per page, but I consistantly get 24. So when I use Word to give me a word count on 141 pages, I get 28k, but when I do it the way I think publishers want a word count for novels, which is by multiplying the number of pages times 250, I get 35k. That's a big difference.
I followed all of your rules, so I don't understand what I'm doing wrong.
Indulge me a moment, please, while I review a couple of standard typographical measures. The smallest unit in typography is called the point, which measures exactly 1/72 of an inch. Twelve points equals 1 pica. Therefore, we have 72 points per inch, and 6 picas per inch.
A standard typewriter uses 12-point type, which is a measure of the height of the metal block on which each individual letter is cast. This also equals the height of a each line of printed type the typewriter produces, meaning that a typewritten line is 12 points high, or 1 pica, or 1/6 of an inch. Single-spaced, this means you can fit six lines of type per inch. Double-spaced, you get three lines per inch.