Kelvin teaches grades 9 to 12 and is part of the South District of the Winnipeg School Division.

The school is named after the mathematical physicist and engineer William Thomson, 1st Baron Kelvin.

This inspired the 2005 documentary, The Boys of Kelvin High: Canadians in Bomber Command, which was produced by Clifford Chadderton, a distinguished Canadian Forces infantry commander and Kelvin High School alumnus.

Grade 9 was added at the beginning of the 1995-96 school year, which significantly increased the student population.

[9] Kelvin offers a variety of courses which include Mathematics (Pre-Calculus, Applied, Essentials, and Introductory Calculus), English, Health, Social Studies, Geography, History, Chemistry, Physics, Art, Band, Choir, Drama, Digital Animation Studio, Graphics, Foods and Nutrition, Clothing and Design, Woodworking, and Computer Science.

The Kelvin Causes Committee has raised hundreds of dollars for War Affected Children in Uganda.

As well as Kelvin's annual Holiday Breakfast, hosting an inner city elementary school each year for a day filled with games, presents, yummy food while spending time with Kelvin High school students.