When to weigh in ?

I'm another one who weighs in the morning, after I use the bathroom. I try to keep it to weekly, though sometimes I can't resist hopping on the scale mid-week "just to see."

I weigh myself in the morning.
Occasionally in the afternoon just out of curiosity -- for me the two weigh-ins are usually the same. Unless I've had an absurdly large meal.

I am no professional but I just try to be consistant. I do mine at 8:00pm. That way, I am being honest with myself at least and I feel like all my decisions count during the day.

Monday morning after using the bathroom.

I recently read an article online from a health science department at a university (cant find the link or I would include it) about how to properly measure the human body for all sorts of things including blood pressure, pulse, weight, size, etc..... The article recommended weighing yourself upon awakening after evacuating your bladder, before ingesting anything, and with as few articles of clothing as possible.

I do it every morning and keep track of it in an excel spreadsheet (among other things for my doctor). I wear only my boxer briefs and my Fitbit (gotta count those steps to the scale!!!!!). I only log my weight to MFP once a week however and I use the weight from the scale at the gym for that day as it is always a few pounds heavier and the tools I use to measure my workouts need the weight you are at the time of the workout to estimate accurately. This way I am always giving myself a few pound buffer, but I always have a fairly accurate estimate of what my body weight is +/- a couple of pounds.

NOTE!!! many things will effect that morning weight. I have found that the amount of water I drink before bed, how many times I urinate, if at all during the night, how much sodium I have ingested the previous day, and believe it or not how much sleep I actually got can cause the morning weight to fluctuate by as much as three or four pounds. I panicked at first trying to figure out what was wrong, but logging it in Excel and charting it over time you can see that those variations sort of cancel out and I can see my weight loss trend.

I really believe that it probably does not matter when, just as long as you are consistent on repeated measurements over time, and allow for differences in water weight, clothing, different scales etc. The only way to be 99.999% accurate would be to go to a university and have your body measured scientifically, while naked, using pools to measure displacement etc.... Not at all practical for almost anyone.

This is just my 10.5 cents and it has worked for me so far, but it is by no means scientific and I am not claiming it as such. I believe that any data, even slightly inaccurate estimates, is better than none for this type of thing.

Thanks for listening to me rant.

I agree with most of the posts so far - first thing in the morning is most consistent for me. I weigh myself on a traditional scale and also on my Wii (gives my 'approximate' BMI). If both are going down I know I'm moving in the right direction!