Cost-Per-Use Shopping Guide: Buy Better, Not More

Cost-per-use is one of the easiest ways to decide if something is worth buying.

Start with a simple formula: total price divided by estimated uses.

A $200 bag used 200 times is $1 per use; a $40 trendy item worn twice is $20 per use.

Ask three questions: Will I use this weekly? Does it match what I already own? Is quality good enough to last?

The best purchases are not always the cheapest — they're the ones you use the most.

GirlMath makes this fun by pairing your logic with real-time internet price checks, so you can confirm value before buying.