Threaded gas canisters for camping stoves come in three different sizes, 100, 230 and 450, this is the weight of gas they contain. In the table above I’ve provided a series over overall canister weights to help you (and me) estimate the amount of gas left in a part used canister.
To get an indication of the percentage of gas left in your part used canister first weigh your part used canister and then either use the table or the following equation to get a percentage
(Current Canister Weight – Empty Canister Weight) divided by Weight of Gas in Full Canister
e.g. if I weighed my 230 canister and the scales said 200g
200g – 126g = 74g divided by 230 = 32% of the canister gas is left of the original volume
Different brands of gas may have slightly different weights of canisters or gas inside but it will make a negligible difference in terms of deciding what you are going to use for a trip
A useful top tip is to use a sharpie (permenant marker) to write the last weighed fill percentage on the bottom of the canister. This can make picking the appropriate filled canister from your stash very easy to do.
I hope this table is as useful for you as it is for me, enjoy!








