It really depends on the situation and Conditions a kilo wouldnt last me a session though even in winter it would probably be fed once I've finished if not used before,it's a tough one to gauge though sometimes, I'm more confident fishing over bait tbh, and I use it to get loads of attraction going into the spot, if I don't catch this session normally it helps farther along the line, too many anglers base there success on one trip, mine is based on a season or year these days, I already think its been a successful year for me but I have used quite a lot of bait, for me bait is confidence and confidence will catch you more carp 👍