How it works
Cost per use spreads the price of something over the number of times you actually use it. A $180 pair of boots worn twice a week for three years costs about $0.58 per wear; a $40 pair worn ten times costs $4.
Subtract what you expect to sell it for later, and add ongoing costs like cleaning or repairs, to get the true net cost.
Be honest about how often you will use it. Overestimating use is the most common way this number ends up misleading.
Formula
Cost per use = (price − resale + upkeep) ÷ total uses
Questions people ask
What is a good cost per use?
It depends on what the alternative costs. Compare against renting, a cheaper version, or paying per visit. A $600 bike used for 300 commutes at $2 each may beat a $5 bus fare.
Should I include resale value?
Yes, if you realistically expect to sell it. Electronics, tools and quality outdoor gear often keep a meaningful share of their value.
Does this account for the time value of money?
No. It is a simple average. For large purchases over many years, inflation and interest make the real cost slightly different.