Calibrating my BX treasure spreadsheet – desired hours per level

In a previous post, I described a method for placing treasure in BX games. It has several input parameters where the best value to use are not obvious.

First, we have desired-hours-per-level. This is a very subjective value, since it represents individual GM’s desires, but to publish adventures I need something that represents a typical desire.

I’ve trawled over sources in blogs and comments about my article, and I’ve come up with a default value of 14 hours per level. That’s derived from “four sessions of 3-4 hours each”.

(A related question is “how should this vary, if at all, across the levels”? I’ve ignored this for now, assuming that people want all levels to be of the same length.)

Now, I didn’t actually find many BX (or even clearly-OSR) sources. Not many people think in terms of hours-per-level, and when people say “sessions” they often don’t even hint at the length. So I’ve branched out a bit, into modern D&D sources too. And when session length is unspecified, I’ve assumed 3-4 hours of real playing time.

OSR sources:

Modern (or mixed) sources:

Question for readers – what do you think of this value? Would you like a published BX adventure to come calibrated to this?

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