 i'll give about two days on the smaller canister and that's my safety cushion i'm sure you could get more than that but i had to use one for a heater before just because like we were hunting it was so cold and we were kind of in bad shape so i used it to heat us up a little bit keep us warm but yeah you're multi-fueled they're pretty nice i guess i'm biased i like the smaller isobutane stove