It was said in a song called "all stars are closer" so I wanna know what does it mean exactly. https://www.youtube.com/watch?v=yvOh7vVqlaE
I recognize your false confidence and calculated promises all in your conversation
As noted by @jxh, calculated can often carry a negative connotation of a shrewd (bordering on inhuman) premeditation. As such, the phrase calculated promises would connote a sort of manipulation that the author feels is receiving from this person.