To calculate using percentage grades that you achieved and credit weight of each course you can use this calculator/link:

http://www.whatsmygpa.ca/ [1]
Step One: in 1. Select your university or college select "University of Guelph"
Step Two: in 2. What type of grades are you inputting? select "Percentage (eg. 75%, 67%)"
Step Three: in 3. Enter your grades and their credit weight enter your grades and their associated credit weight (i.e. 0.25, 0.50, 0.75 from the transcript)
Step Four: select "Calculate"

Updated 17 April 2018.