Girl Math

What is girl math?

Female financial logic

Girl math is a social media trend that refers to how many women justify expensive purchases and other financial matters. People typically use it to poke fun at how women spend their money, but some may also use it seriously to ridicule women's logic.

For example, a woman may post, "girl math is when I bought tickets to the concert tomorrow ten months ago, so it's basically free." Or, a guy may make fun of his girlfriend by texting her, "That's girl math," in response to her rationalizing spending more money on clothes to get coupons.

Origin of girl math

The "girl math" trend gained traction in August 2023 on TikTok, partially growing out of the girl dinner social trend. Many female TikTokers began to share their girl math examples, like "Anything under $5 is free" and "returning $50 worth of clothes makes your next $100 purchase only $50." Due to its popularity, girl math spawned the boy math trend.


My friend paid for my lunch so I'm going to put the money I would have spent on that towards dinner. So, it's basically half-off
Girl math
Girl math example from TikTok
Girl math example from TikTok

Related Slang


Updated September 28, 2023

Girl math definition by

This page explains what the slang term "Girl math" means. The definition, example, and related terms listed above have been written and compiled by the team.

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