Weigh-in frequency?

I weight myself every morning on the same scale at about the same time. My Fitbit & MFP combo auto logs for me. I don't weight myself over the weekends because I ease up a little and know the weight will vary 5 lbs or so... Monday morning is usually when I see the biggest different in terms of a small gain due to eating out, eating differently over the weekend. I don't eat bad over the weekend but I do go out to dinner and allow myself a few snacks that I don't normally have. By Thursday or Friday morning I always see a loss. Don't obsess over the number... you could weight yourself five times a day and get five different numbers. Also, like the poster above me said, you won't gain weight overnight. Even if you were too eat very badly for two days, any weight gain as a result is most likely water/sodium/bloat, etc. which only takes a day or two to get out of your system. If you are the type who obsesses about the number I would recommend only weighing yourself once a week.

I do it Saturday morning and Monday morning. I do my measurements Monday morning. I usually see a pound gain from the weekend cuz I tend to not count calories those days, but as long as it's a loss for the whole week, I'm happy and ready to refocus for the week.

I tend to weigh every other day or so, but only track it weekly. I also use a tape measure because I've been exercising and strength training a lot, so my weight goes down fairly gradually, but I've lost several inches already off my belly/hips/thighs. 8 pounds doesn't seem like much, but seeing the measurements on the tape go down is also very motivating Our eyes/brains often don't keep up with weight loss. I see myself the same, but everyone is commenting that I'm looking smaller - so use both, but put more trust in the tape measure and how your clothes fit than the scale.

Once a week. If I did it more often, I'd drive myself crazy.

I weighed myself this past Saturday morning as I always do and was disappointed to see I had actually gained .2 lb. On Sunday morning, I stepped on the scale (still in PJs and everything; I normally weigh nude) just to satisfy my curiosity and I was down 1.4 lb from the day before. Of course I didn't lose 1.4 lb in one day, it was just a weight fluctuation, so I didn't log it. I won't weigh in again until this upcoming Saturday, so we'll see where I stand then. But it drove me crazy that the numbers were so different and I started wondering if my scale was broken. Nope, once a week for me is more than enough!

I don't understand the logic of weighing yourself multiple times a day, though.

When losing the weight, i weighed once a week with a sneaky check in between. Now i'm maintaining i do it once a month.

I weigh every day - straight out of bed. I don't normally log it though but once a week.

The trick is not to obsess over it. As long as you see progress over time, all is well.

You didn't gain the weight overnight - you certainly won't lose it that fast.

Yep... me too. This way I get to feed my scale addiction but keep it real at the same time ;-)

Sometimes 3-4 times a day - particularly when I'm set on a goal weight to achieve.

At other times, barely once a week. Today was my first weigh-in in over a week and a half.

First thing in the morning...everyday.

I used weightgrapher.com and logged my weight after getting out of bed in the morning and emptying my bladder.
I found myself getting too annoyed at unexplained fluctuations so I decided to shun my scale for one month, keep up my normal routine of calorie counting and exercise and see how much I weigh in a month. Yesterday was the first morning without weighing myself and it was annoying, but today I didn't even think about it. Hopefully I will have made some nice progress in four weeks

But as others have said: if the general trend is downwards, then small fluctuations should not matter so much. It is a lot easier on your mental health to cut down the weighing if you are affected by it.