Calculate the Real Cost Per Use of Any Purchase
Divide purchase price by expected uses to see the true per-use cost. Justify expensive purchases or avoid waste.
The Cost Per Use Framework
A $200 pair of boots worn 3x/week for 3 years = $0.43 per use. A $50 pair worn 3x/week for 6 months = $0.64 per use. The expensive option is actually cheaper per use. This framework helps make rational purchasing decisions: expensive items used frequently are often better value than cheap items that wear out quickly or sit unused.
When Expensive Is Worth It
Items with the best cost-per-use: daily-wear shoes, a good mattress (used 8 hours/day for 10 years = $0.03/hour), a quality winter coat, kitchen knives, and a reliable car. Items with the worst cost-per-use: exercise equipment (statistically, 70% goes unused after 3 months), specialty kitchen gadgets, occasion-specific clothing, and trending electronics.
The Diderot Effect explains why one purchase leads to more: you buy a nice desk, then need a better chair, then a desk lamp, then organizers. Before a purchase, ask: "Will this create a chain of additional purchases?" A $500 stand mixer might also require $200 in attachments, $50 in new bowls, and a kitchen reorganization.
