[chriswitts]

Empirically speaking 4/4/9 calories per gram of carb/protein/fat. So generally speaking no, 1lb != 3,000 calories.

[indecisive_user]

OP was referring to the amount of calories stored in a pound of adipose tissue, which is around 3500 kcals.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2376744/