Each of the self-paced courses will show a "detailed course outline" on the course page. These will list the number of "days", whereby in the equivalent instructor led course a day is 7 hours of course time.
Machine Learning, Deep Learning, and Programming Techniques would each be approx. 14 hours.
Fundamentals and Financial Applications would be approx. 21 hours.
Data Processing and Visualization would be approx. 7 hours.
All of the OnRamp courses would be approx 2 hours in length.