Pew Research has him at 39%, with 58% disapproval.
The average of  eighteen polls is  45% approval and 50% disapproval.
Rasmussen is automated, vote as many times as you like.

Monday, February 20, 2017
The Rasmussen Reports daily Presidential Tracking Poll for Monday shows that 51% of Likely U.S. Voters approve of President Trump’s job performance. Forty-nine percent (49%) disapprove. The latest figures include 35% who Strongly Approve of the way Trump is performing and 39% who Strongly Disapprove. This gives him a Presidential Approval Index rating of -4.