How much does your weight vary day to day?

I was wondering how much your weight should change day by day. I used to weigh myself just once a week (at the same time/same scales/wearing nothing, etc), but one day I weighed myself the next day too out of interest, and my weight had changed by 2 kilos. (The next day it was back to normal) My weight seems to fluctuate every day by up to two kilos. Is this normal, and am I just getting obsessed?

Thanks :)

[nart]

i dont know what kilos is because my weight changes every dat up 5 pound

[elaine1961]

Im not sure how much, is normal But i have been going up and down, and my hubby as also gone up about 3.6 Lbs one day then down 2 lbs the next. i think some of it depends on fluid retention, i wouldnt worry to much about day to day,you can see your weekly amounts so go by that,easier said than done i know,if going up upsets you then dont weigh everyday.i get really gutted when i go up, but i still weigh daily