shrewd vs calculating

shrewd and calculating both are adjectives.

Word	Noun	Adjective	Verb	Adverb
shrewd	No	Yes	No	No
calculating	No	Yes	No	No

As adjectives, shrewd and calculating are synonyms defined as:

Other synonyms of shrewd include calculative, conniving, scheming.

shrewd (adjective)	calculating (adjective)
acting with a specific goal	acting with a specific goal
marked by practical hardheaded intelligence