Say youâre at Anderson Cafe and get a venti iced chai, but only drink half of it before you throw it away. You donât feel bad because it was basically free with the swipe: girl math. Or when youâre out shopping with your friends and buy a pair of $120 Lululemon pants with $110 cash, so the pants actually just cost $10: girl math.Â
The concept of âgirl mathâ has been spreading across Tiktok like wildfire. Some say itâs a totally valid way of managing and justifying your spending, while others say itâs complete nonsense. If youâre new to the trend, girl math is just a process (typically among women) of justifying how we spend our money and what our actual costs really are. The most common form of girl math is making returns where the reimbursement goes back into your account meaning that you made money. Another is buying something with cash, so when the balance in your account stays the same, there is technically no cost.Â
When thinking of girl math from an economic standpoint itâs really just a combo of three basic principles. The first is sunk cost which in girl terms just means âIf I return my $20 Brandy top and get a $15 top with a $5 headband I got two new things for freeâ. Okay, but in all seriousness, sunk cost is when moneyâs been spent and wonât be recovered in the future. I feel like this is definitely my favorite way of girl math-ing since it kind of follows the idea that if it leaves my account, thatâs whatâs been spent. Letâs just say cash is a girlâs best friend in these cases!
Second is cost-per-wear, which in simple math is the price of the purchase divided by the times that youâll use it. See, when I was out shopping last winter at Aritzia I just NEEDED a SuperPuff jacket. I was going to go on a cold and snowy trip so I knew I was going to wear it a ton, but also itâs great quality so in my brain itâs going to last forever. From this I used my economic thinking to estimate that Iâd wear the jacket at least 20 times a year for its potential product lifetime of 10 years (since itâs like really high quality). So I took the $375 price tag and divided it by 200 wears, so really itâs only about $1.88 per wear! When you have a lower cost-per-wear, in girl math that just means that you got a better deal that couldnât be passed up.Â
The final step in girl math is prospective cost. Prospective cost is seen as taking a chance on something that wonât be available later, or avoiding future costs if you take action sooner. With Black Friday right around the corner, a lot of prospective costs will be going on. During big sales like these, we feel the need to take advantage of the really good deals that are right in front of us instead of paying full price later on. I know that Iâll be evaluating the prospective cost of Black Bough bikinis this Black Friday since A) itâs bikini off-season and B) itâs at an amazing discounted rate that wonât be available until next year!
So, is girl math good? Well, itâs not as simple as a yes or no answer since there are plenty of pros and cons. Some of the most evident pros of girl math are that the phenomena empowers women in making financial decisions, lets us evaluate the impact of our spending, teaches us about navigating investments and displays an improved quality of life. On the other hand some cons are that people tend to spend more than they can afford, âlong-term investmentsâ arenât taken care of and actually have a shorter product lifespan, and it makes women appear irresponsible or financially illiterate.
Even though women apply these simple economic principles to justify their purchases, why is girl math deemed as negative while finance bros and âboy mathâ are seen as positive things? I guess thatâs for the future of spending to tell. But for now, girl math is just a fun way to explain where our money is going while still being financially responsible!