How to estimate of the amount of gas that you need for backpacking with the Primus Eta Spider?

fuel consumption formula

The variables involved are:

The amount of fuel you need is: $$ p \cdot d (f_p w_d + f_b w_c) $$

Some notes:

articles about gas canister consumption

Canisters come in 100g (3.5 ounces) and 230g (8.1 ounces) sizes.

more precise estimates of grams of gas / liter of water

drinking water

It varies a lot by person, and by activity. 2/3 liter per hour is a very rough estimate.

28 Dec 2014 trip