Math subreddits
We found 37 active math subreddits: communities with at least one new post a day on average in September 2026, ranked by members. The largest is r/math with 3.98M members. The busiest is r/theydidthemath, with 1,223 posts last month. In 1 of the 24 we could measure, a brand-new account's post usually stays up: they remove 17% or fewer of posts from accounts under a week old.
Data for 37 communitiesDownload CSV
- r/math3.98M members
- r/theydidthemath1,223 posts in September 2026
- r/LinearAlgebra+109% members in 12 months
- r/Laddergram6% of new-account posts removed
All active math subreddits, by members
| # | Subreddit | Members | Posts / month | Member growth, 12 mo | Median author age | Women | Posts with a reply | New-account posts removed | Links |
|---|---|---|---|---|---|---|---|---|---|
| 1 | r/math↗This subreddit is for discussion of mathematics. All posts and comments should be directly related to mathematics, including topics related to the practice, profession and community of mathematics. | 3.98M | 1,065 | +2% | 23 | 19% | 95% | 100% | Yes |
| 2 | r/theydidthemath↗And they said math has no real world applications | 2.45M | 1,223 | +11% | 32 | 14% | 97% | 99% | Yes |
| 3 | r/HomeworkHelp↗Need help with homework? We're here for you! The purpose of this subreddit is to help you learn (not complete your last-minute homework), and our rules are designed to reinforce this. | 677K | 386 | +2% | 21 | 30% | 99% | 59% | Yes |
| 4 | r/mathmemes↗Give me some mathematical memes! | 611K | 499 | +7% | 28 | 20% | 100% | 97% | Yes |
| 5 | r/learnmath↗Post all of your math-learning resources here. Questions, no matter how basic, will be answered (to the best ability of the online subscribers). | 477K | 1,192 | +17% | 23 | 22% | 76% | 28% | Yes |
| 6 | r/mathematics↗r/mathematics is a subreddit dedicated to focused questions and discussion concerning mathematics. | 256K | 1,050 | +30% | 26 | 18% | 67% | 88% | Yes |
| 7 | r/askmath↗This subreddit is for questions of a mathematical nature. Please read the subreddit rules below before posting. | 249K | 777 | +17% | 26 | 18% | 76% | 32% | Yes |
| 8 | r/calculus↗Welcome to r/calculus - a space for learning calculus and related disciplines. Remember to read the rules before posting and flair your posts appropriately. | 208K | 349 | +21% | 21 | 22% | 85% | 67% | Yes |
| 9 | r/MathJokes↗Math Jokes | 129K | 213 | +66% | 32 | 16% | 69% | 26% | Yes |
| 10 | r/3Blue1Brown↗This subreddit is for discussion of topics loosely related to the animated math videos of 3blue1brown. | 106K | 143 | +27% | 24 | 12% | 36% | – | Yes |
| 11 | r/maths↗r/maths is a community dedicated to problem-solving in mathematics across various topics and levels. | 73K | 96 | +17% | 25 | 18% | 31% | 93% | Yes |
| 12 | r/MathHelp↗A sub for helping you with your mathematics problems! If you're willing to learn, we're willing to teach. | 58K | 169 | +11% | 21 | 29% | 95% | 98% | No |
| 13 | r/desmos↗A subreddit dedicated to sharing graphs created using the Desmos graphing calculator. Feel free to post demonstrations of interesting mathematical phenomena, questions about what is happening in a gra | 55K | 364 | +29% | 19 | 18% | 84% | 38% | Yes |
| 14 | r/matheducation↗/r/matheducation is for discussions of math teaching and pedagogy. | 43K | 261 | +20% | 32 | 35% | 62% | 35% | Yes |
| 15 | r/logic↗This subreddit is a venue for discussion on the subject of logic, the branch of philosophy and mathematics concerned with reasoning. Both philosophical and mathematical logic are welcome here. Informa | 42K | 116 | +31% | 25 | 17% | 89% | 82% | Yes |
| 16 | r/GAMETHEORY↗Game theory is the science of strategy and decision-making using mathematical models. | 42K | 35 | +18% | 27 | 14% | 61% | 19% | Yes |
| 17 | r/probabilitytheory↗For everything probability theory related! No matter if you're in highschool or a stochastic wizard; if you want to learn something about this subject you're most welcome here. | 36K | 44 | +59% | 27 | 15% | 63% | – | Yes |
| 18 | r/mathriddles↗This subreddit is for anyone to share math or logic related riddles, and try and solve others. Come check it out! This subreddit is designed for viewing on old.reddit.com. | 31K | 41 | +8% | 26 | 15% | 75% | – | Yes |
| 19 | r/LinearAlgebra↗a home for linear algebra | 31K | 67 | +109% | 24 | 19% | 59% | – | Yes |
| 20 | r/alevelmaths↗All your mathematical needs for AS and A2 maths and further maths. | 26K | 297 | +61% | 18 | 41% | 41% | 26% | Yes |
| 21 | r/mathsmemes↗A maths meme sub with okay moderators | 26K | 47 | +36% | 23 | 18% | – | 19% | Yes |
| 22 | r/Laddergram↗new-account friendlyA word ladder puzzle game. | 22K | 284 | +45% | 26 | 38% | 83% | 6% | No |
| 23 | r/puremathematics↗This subreddit has closed indefinitely, in protest of Reddit's API changes and unprofessional response. | 21K | 38 | +9% | 28 | 15% | – | – | Yes |
| 24 | r/PhilosophyofMath↗Philosophy of Mathematics | 21K | 95 | +26% | 31 | 14% | 56% | – | Yes |
| 25 | r/CasualMath↗This is a subreddit that is meant to be somewhere inbetween /r/math and /r/learnmath. | 18K | 226 | +16% | 28 | 18% | 40% | – | Yes |
| 26 | r/manim↗Manim is an animation engine for explanatory math videos created with Python. | 18K | 51 | +22% | 23 | 9% | 41% | 22% | Yes |
| 27 | r/Geometry↗Geometry | 17K | 130 | +37% | 28 | 19% | 16% | 88% | Yes |
| 28 | r/apcalculus↗A subreddit intended to help students score higher on the AP Calculus Exam and raise your in-class grade. | 16K | 104 | +40% | 18 | 36% | 66% | 23% | Yes |
| 29 | r/mathteachers↗Math Teachers | 16K | 266 | +28% | 36 | 44% | 48% | 61% | Yes |
| 30 | r/Mathematica↗Mathematica | 15K | 37 | +13% | 25 | 14% | 26% | – | Yes |
Show all 37 subreddits
| # | Subreddit | Members | Posts / month | Member growth, 12 mo | Median author age | Women | Posts with a reply | New-account posts removed | Links |
|---|---|---|---|---|---|---|---|---|---|
| 31 | r/MathOlympiad↗For those participating in Math Olympiads around the world. | 10K | 145 | +61% | 18 | 26% | 59% | 37% | Yes |
| 32 | r/Precalculus↗A subreddit that helps people with their math problems and discusses Precalc-related topics. | 9.3K | 44 | +28% | 20 | 33% | 75% | – | Yes |
| 33 | r/AppliedMath↗Math for people who care about practical and applied aspects of math. Rules: * Obey the reddit TOS * No low-effort homework help posts * Don't spam * Treat people with respect * No content that wou | 7.5K | 56 | – | 24 | 18% | 58% | – | Yes |
| 34 | r/mathpuzzles↗This is a subreddit dedicated to mathematical puzzles and challenges. | 7.2K | 121 | +43% | 32 | 14% | 54% | – | Yes |
| 35 | r/fucksparx↗We really do not like Sparx Maths, Science or Reader. | 6.9K | 56 | +95% | 16 | 31% | 99% | 20% | Yes |
| 36 | r/infinitenines↗Understanding the power of the family of finite numbers, where the set {0.9, 0.99, 0.999, etc} is infinite membered, and contain all finite numbers. The community is for those that understand the reac | 5K | 85 | +81% | 28 | 13% | 82% | – | Yes |
| 37 | r/PassTimeMath↗This subreddit was created for people who love solving math questions during their free time. If you are one of us feel free to post away. | 4.8K | 49 | – | 29 | 15% | 57% | – | Yes |
Looking for a ranking by size and growth? Top math subreddits by tier.
How this list is built
Subreddits are grouped into topics by what their posts are about; this list holds the math group. We include subreddits that are safe for work and had at least 30 new posts in September 2026, about one a day.
Members is Reddit's subscriber count; growth compares it with a year earlier. Posts with a reply is the share of posts that got at least one comment over the last three months. Median author age and women are estimated from what authors say about themselves, and shown only when enough of them did. New-account posts removed is the share of posts from accounts younger than 7 days that were removed; communities at or below 17% are marked new-account friendly. Min. age/karma means the subreddit asks for a minimum account age or karma before you can post.
The list is rebuilt every month from public Reddit posts and comments. Data and CSV are free to reuse under CC BY 4.0 with a link to this page.
Math subreddits: common questions
What is the biggest math subreddit?
r/math, with 3.98M members in September 2026. Next are r/theydidthemath (2.45M) and r/HomeworkHelp (677K).
Which math subreddits are the most active?
By posts in September 2026: r/theydidthemath (1,223 posts), r/learnmath (1,192 posts) and r/math (1,065 posts).
Which math subreddits can a new account post in?
r/Laddergram (6% of new-account posts removed). They ask for no minimum karma or account age, and most posts from accounts under a week old stay up.
How often is this list updated?
Every month, when we rebuild our subreddit data. This version uses data for September 2026. Member counts come from Reddit; activity, removals and who writes come from public Reddit posts and comments.
Find the subreddits that fit your post
This list is the same for everyone. Find Subs narrows it to communities your account can post in, where your audience writes, and tells you when to post.