Popa
Online calculators (and any chart for that matter) are extremely basic. They dont take anything like body frame, muscle, ethnicity etc in to account, all of those things are factors. A female at 5’8” 140 lbs may be ideal for a small framed woman, with no muscle, and no shape.
“I am 5’7”, and I weigh less than 140, and I do not look “skinny” “
Yes, I am sure you are a regular Dwayne Johnson. Mazal Tov, you are Jewish.