How many promotion points can I earn if I have 103 total college credits (E-4 To E-5)?

With that amount of college I would suggest you to go and talk with an education counselor regarding completing your degree!

Depends on if they are semester credits, or quarter credits. Answer is in 600-8-19 section 3-19 or page 48-49

Assuming that these are semester hours and not quarter hours or credit hours, and that you have not completed a degree, 60 points (limited be AR 600-8-19 para 7-55a(2)). With a Bachelors Degree, 75 points (same reference (3)).
If those are quarter hours, divide your hours by 1.5 (68.7) and subject it to the limits above - Same answer.
Clock hours are 1 point per 16 hours earned.

Unless things have changed, you should be maxed...

Hi CPL Williams,
I found this excerpt on the Army Study Guide. Hope that you find it helpful! Good Luck!

Here's a quick rundown of the benefits of taking college courses while serving:
Earn 1 promotion point for every completed credit hour
Earn 10 promotion points for a degree completed while serving
Earn 10 promotion points for a obtaining a 1/1 Defense Language Proficiency rating
As of June 1, 2011, Specialists (E4) can now earn a maximum of 75 civilian education points toward promotion to Sergeant (E5). Sergeant (E5) can earn up to 100 points toward promotion to Staff Sergeant (E6). Civilian education promotion points for the other grades remain at 100 points.

It depends if your are Active Duty or reserve/National Guard
I would also have you consider looking at completing your degree and perhaps looking at commission.
For Active duty soldiers - you get 2 points for every semester hour - up to a maximum of 135 for E-4 to E-5
For National Guard you would max out at 75 points.

Professional advice, as a future NCO, I highly suggest you familiarize yourself with AR 600-8-19. This will provide you the knowledge you would need as a leader to better assist your future Soldiers. So if you believe you’re ready for the next level in your career, make it happen to refer to Army regulation for guidance and then ask questions for clarification. Good luck to you future leader.

You should be maxed out.

You should have enough points with a high apft and an expert qual.