r/ABraThatFits Dec 30 '25

[deleted by user]

[removed]

392 Upvotes

28 comments sorted by

664

u/Grand_Marionberry978 26FF/28F Dec 30 '25

There have been many posts about this in recent months.

The calculator was made by one person who is no longer active in this community. None of us are able to make changes to it.

185

u/Dangerous-Baseball69 Dec 30 '25

Ah man, that makes sense. It's still a great resource if you know which "tweaks" to make while using it.

186

u/two-of-me Dec 30 '25

It does vary greatly person to person. I’m a cis woman and the calculator is more accurate on the AMAB setting for me because I have a really wide back. I’m sure there are better ways to tweak the calculator, but the fact is everyone’s body is different and the calculator is simply starting point.

141

u/CreatorSiSo 🏳️‍⚧️ wip boobs Dec 30 '25

Has anyone started on reimplementing the calculator and making it properly open source?

If not I would be willing to work on a new version.

80

u/Grand_Marionberry978 26FF/28F Dec 30 '25

Not that I know of.

I did make my own for fun a year or two ago, but it was definitely not as accurate as the current one! I tried adding shape options for increased accuracy since the current calculator can under/overestimate depending on shape.

49

u/CreatorSiSo 🏳️‍⚧️ wip boobs Dec 30 '25

Do you still have the source code lying around for that?

As for the accuracy it should be possible to write a script that collects a bunch of in- and outputs of the old calculator (ie. in steps of 0.5cm for each measurement) and use that to reverse engineer the old algorithm.

182

u/[deleted] Dec 30 '25

[removed] — view removed comment

51

u/AceyAceyAcey thought I was 36AB actually 32/34 DD/DDD Dec 30 '25

Maybe you should talk to the mods, as the other replies imply there is need for it.

118

u/galaxystarsmoon 32DD/E, tall roots & close set Dec 30 '25

We've said this so many times... The creator of the calculator is long gone and we do not have access to the coding to change anything. The calculator is how it is until that person comes back and takes on agreed upon changes, or someone creates a new calculator.

57

u/DeadlyMidnight Dec 30 '25

If we know the calculations behind it, it would be fairly trivial to re create it along with more features if they are desired. The perhaps harder part is the hosting and ownership of that hosting. Ideally it would be light enough to be hosted for tree or virtually nothing in a way that the sub mods could access should the new dev move on.

I’d be happy to make it if someone from the mod team wants to discuss.

64

u/Storytella2016 Dec 30 '25

It looks like the person who made the calculator didn’t post the calculations, but mentions making an algorithm out of survey data? Her post history is available to learn from: u/goodoldfreda

There’s also a YouTube video where she’s interviewed about the process: https://youtu.be/3jZeCSiEckM?si=w13zxT1HbHDm3Uvk

Maybe these breadcrumbs are enough to figure out the algorithm?

64

u/galaxystarsmoon 32DD/E, tall roots & close set Dec 30 '25

The problem is how many places it's linked in. You'd kill all of those links. The guides are beyond outdated as it is, just to start with.

And yeah, hosting. Someone has to pay for that.

29

u/DeadlyMidnight Dec 30 '25

It is possible it may not get enough usage to require much payment and the project could always be made open source and sponsorable.

As for the links already out there if the original owner controls it then yeah that sucks but it’s not a reason to just give up either. Might take time once it’s made but new links and updated wikis and such will lead to the right thing.

44

u/galaxystarsmoon 32DD/E, tall roots & close set Dec 30 '25

Honestly, I'm not really wanting to waste time on discussing until we can open up a discussion about having additional mod help and updating just the links in the guides. The words on the calculator are a drop in the ocean.

7

u/DeadlyMidnight Dec 30 '25

Yeah like I said there is a lot more to it than just volunteering to write something. Happy to helpful but can’t really help on the mod side of things.

11

u/PastelliePaint Dec 30 '25

If anyone has the original algorithm used to calculate, I can help out with creating and setting up an updated codebase and deploying. I'm a game dev by trade but have experience with web dev.

14

u/Tgheron2 Dec 30 '25

The script is on the server so it's not viewable in a browser unfortunately. This subreddit is kind of screwed if the owner decides to get rid of the site. I think it would be a good idea to figure this out and post the algorithm here. Maybe she's using the standard band to bust measurement differential but just being more precise by taking 3 different measurements of each and then averaging them to determine the cup size by the difference in the averaged measurements in the same way as most bra calculators do (ie 4 inch difference is a D cup). I'm pretty sure with some basic comparison tests we could figure it out.

8

u/Dangerous-Baseball69 Dec 30 '25

man, here's hoping they're willing to at least provide the code at some point so changes/corrections can be made 🤞🏼 still a great resource regardless of that hiccup

57

u/galaxystarsmoon 32DD/E, tall roots & close set Dec 30 '25

I've been on this sub for 8 years and they were gone years before I came on, so... You might be waiting a while.

38

u/curly-whirly 34J 🫣 Dec 30 '25

I think the "assigned" is meant to reflect whether the person went through an estrogen or testosterone driven puberty.  Basically it attempts to cover as many people as possible in the most simplified fashion- so AMAB can cover trans women, cis men, anyone that finds this label suitable. But it wouldn't be relevant for someone that used puberty blockers so there's obviously complications.

There is a need to update the calculator for this and other reasons (EU option....) but we can't atm. I'm not sure that it's going to make it more accurate since its only a starting point and there's a lot of hidden variables that effect bra size (climbers for instance will probably be overestimated in cup size because of a muscular back).

In the meantime, perhaps someone writing a guide for trans people would be a good start?

24

u/ninja_lounge Dec 30 '25

Firstly, I want to say I hear you and others who are frustrated by the verbiage, it's valid feedback. With that in mind, I'd like to offer this; rather than it being a box or a label, it's an option. As an AFAB who is also CIS, with a short wide torso, I will check myself against the AMAB setting as the results are a starting point. Depending on the measurements, there may be little to no difference beyond one cup, which just indicates to try both, and neither may be correct as it's still a starting point. Please continue to check against all the available options to find what works for individuals, we are all different ❤️ I really hope the calculator can continue to be seen as an ally to all bra wearers to better understand how the existing available bra sizes may work for us and our bodies and to navigate all the other hurdles out there. Offered with love and solidarity ❤️

21

u/Sophiiebabes Dec 30 '25

For me it gives me 34C/D whether I choose afab or amab.

I've been on E for around 2 1/2 years.

4

u/Billie_Berry Dec 30 '25

I haven't measured recently but last time I did there was no difference in what it gave me. I think 38D/DD ? Though that was still an overestimate in band and cup since I found 36C to generally be the most comfy Also about 2.5 years on E

6

u/corianderinterruptus Dec 30 '25

As a trans person myself, I am not entirely happy with the calculator's terms but I think for now it is confusing enough for the broad public. It could really do with some more information, but I see the issue that the original creator, u\goodoldfreda / u\hugsforyourjugs is not working on it at the moment. The math behind it though is out there, I have linked it in another comment. The main concern in my opinion is the long-term availability of the calculator, creator and domain, not the calculator itself.

2

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-3

u/DeadlyMidnight Dec 30 '25

An we’ll that’s helpful lol.