Back in 2012, I took a look at the common prescription for weight loss: Eat less. Well, ok, eat less than what? The answer is your resting metabolic rate (RMR). OK. How do I find my resting metabolic rate? Well in 2012, there were a number of calculators available on the web. I recently revisited this question. I did a number of Google searches for “resting (or basal) metabolic rate calculators” or “how many calories should I eat”. What I found is that several of the governmental sites had just taken down their on-line calculators. But the existing calculators game me answers of 3,493, 2,725, 3,027 and 1,937 calories a day just to maintain my current weight, without gaining weight or losing weight.
So, if you are looking to figure out your resting metabolic rate so you can calculate how many fewer calories you need to lose weight, the present calculators, based on my age/weight etc., have a range of 1,556 calories per day, a huge amount, equivalent (perhaps) to about half a pound per day!
Until we can give the public an accurate number on which to determine their current caloric requirement, perhaps we should stop recommending they eat less until we know what that means.
There are alternate calculators but these are not represented on well-visited sites.