Article by Will Reitveld here:
Covers your question, based on testing a number of different stoves under various conditions. Subscription to read full text, I believe.
Example: He estimates "gas mileage" for a Snow Peak Gigapower (my stove) under field conditions at around 8 quarts (~ liters) per 4 oz canister. "Field conditions" mean moderate flame, variable wind, and some sort of wind screen.
Wind screens for canister stove is another topic (and one you should research), but performance will be pretty bad without.
Edit: Obviously, 4 oz canister ~ 8 qts. is consistent with Jerry's answer above, and the spec on Bob's stove.