It says in 5 weeks you will weigh..

Mine has been quite accurate, but I'm getting to the point now where things might slow down (I lost 3lb last week, that's not a weekly weight loss I can maintain) so we'll see. I try and average it out across the week and divide by the 5 weeks, it usually works out around 2lb -2.5lb a week, which is about right. My calories don't change much day by day though, so that might be a factor also. I don't tend to put my exercise calories in though, it just throws me.

CharlieBeansmomTracey wrote: »

The projection thing means that if you ate the same amount,worked out the same amount and burned the same amount of calories you would lose that much weight in 5 weeks but you would have to do the same thing every day and be as accurate as possible to get there. if the thing was correct I would have been at my goal weight more than a year ago. but I dont eat the same every day or do the same workouts/activities so I know that because of that its not going to be exact.

Yes to this.

Moreover, your MFP goal is only an estimate. If you want better projection accuracy, you have to adjust based on your personal loss-rate experience, after 6 weeks or so.

MFP's (and other calculators') estimates are averages, based on research studies of large groups of people. Most people are close to the averages (in statistical terms, standard deviation is relatively small). But a very few people could be up to several hundred calories per day different from the estimate, in either direction.

Read this, if you're interested in the subject:

https://examine.com/nutrition/does-metabolism-vary-between-two-people/