Part-Time Per-Credit Costs. 4,193 of the 6,631 undergrads at Davenport University take classes part-time. The per-credit-hour charge for part-time undergraduate students at Davenport University in 2015 - 2016 was $633. Typically, college classes consist of 3 or 4 credits, bringing the cost per class to $1,899 or $2,532. At many colleges, full-time tuition kicks in at around 12 credit hours.