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Alternatives to r/Physics

A short, curated guide — not an automatic related dump. Figures come from SubMouse's safe-for-work directory when we have them.

r/Physics (about 3.3M members, directory rank #320) is for physicists and physics students. Straightforward homework-style questions, multi-field science news and mathematics each have clearer homes when the framing is not physics study or research.

How to choose

Stay on Physics for physics discussion among students and researchers. Use AskPhysics for question-driven physics help, science for broader research news, and math for mathematics rather than physics.

Starting point: r/Physics

r/Physics — Physics

Members: 3.3M
Directory rank: #320
7-day growth: +1.1K

For physicists and physics students. See the rules before posting, and the subreddit wiki for common questions. Basic homework questions are not allowed.

Curated alternatives

r/AskPhysics

Ask Physics

Members: 1.6M
Directory rank: #669

When to choose it: Physics questions looking for answers.

Why it is here: Listed as related to Physics (about 1.6M members, rank #669).

How it differs from r/Physics: Question-driven help versus Physics’ discussion remit.

r/science

Reddit Science

Members: 34.6M
Directory rank: #11

When to choose it: Scientific research across disciplines.

Why it is here: Public description: This community is a place to share and discuss new scientific research. Read about the latest advances in astronomy, biology, medicine, physics, social science, and more. Find and (about 34.6M members, rank #11). Listed with Physics in science neighbourhoods.

How it differs from r/Physics: Multi-field news versus physics-specific community.

r/math

math

Members: 4M
Directory rank: #239

When to choose it: Mathematics discussion rather than physics.

Why it is here: Public description: 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 communit (about 4M members, rank #239).

How it differs from r/Physics: Math field versus physics field.

Need a longer list?

Run the automatic finder for r/Physics (results are matched from our directory; that page is not indexed): Find related to r/Physics.

Members and public descriptions come from SubMouse's safe-for-work directory (as of 2026-11-02 UTC); 7-day growth measured from 2026-10-26. Posts/day and culture claims appear only when we have them — missing fields stay n/a. Directory rank is listing order. Communities outside the published Top 100 open in the info tool instead of a full community page. Guide updated 2026-11-07.

More guides

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r/programming alternatives — Learning, careers, languages, web, humor and game-dev rooms next to the main programming hub.
r/travel alternatives — Solo trips, hacks, regional boards, budget travel and van life next to general travel.
r/gardening alternatives — Indoor plants, IDs, homestead life, veg plots and plant triage beyond general gardening.
r/Fitness alternatives — Beginner, bodyweight, lifting, CrossFit and weight-loss rooms beyond general fitness.
r/personalfinance alternatives — Budget-stretched help, frugality, debt payoff, credit cards, investing, FIRE and country-specific money rooms.
r/Cooking alternatives — Technique answers, beginner help, recipe sharing, grilling, slow cookers, baking and meal prep.
r/movies alternatives — Recommendations, film details, box office, horror, screenwriting and half-remembered titles.
r/Music alternatives — Discovery, music-making, and genre rooms for indie, hip-hop, pop, electronic and K-pop.
r/gaming alternatives — In-depth discussion, PC news, PC culture, and Nintendo and PlayStation rooms.
r/history alternatives — Sourced answers, memes, old photos and everyday life in the past.
r/science alternatives — Science Q&A plus biology, physics, chemistry, psychology, astronomy and NASA.
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r/Parenting alternatives — Moms, dads, pregnancy and other family-support communities.
r/dogs alternatives — Training, behavior and dog-photo rooms.
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r/LifeProTips alternatives — YSK facts, lifehacks, productivity, discipline, cleaning and adulting.
r/food alternatives — Budget, healthy, quick and cuisine-specific food communities.
r/nba alternatives — Serious NBA discussion, all-league basketball, memes and wider sports.
r/relationship_advice alternatives — Relationships, dating, general advice, conflicts, long distance and social skills.
r/malefashionadvice alternatives — Deals, streetwear, vintage and women’s fashion advice.
r/explainlikeimfive alternatives — Quick questions, current-event context, joke explanations, object IDs and science answers.
r/hiking alternatives — Backpacking, camping with gear, and campsite camping.
r/photography alternatives — Critique, film and technique rooms beyond general photography talk.
r/cats alternatives — Startled, orange, smol and cat-dog rooms beyond general cats.
r/cars alternatives — Dashcam fails, bad mods and repair advice beyond enthusiast hub talk.
r/pcmasterrace alternatives — PC gaming news, build help and hardware discussion beyond PCMR culture.
r/pcgaming alternatives — PCMR culture, multi-platform gaming and hardware lanes around PC gaming news.
r/space alternatives — Amateur astronomy and space photography beyond broad space science.
r/camping alternatives — Hiking-with-pack and day-hike rooms beyond car/tent camping.
r/Art alternatives — Drawing practice, learning resources and pixel art beyond serious art discussion.
r/loseit alternatives — Keto, budget-healthy eating and training rooms around weight-loss support.
r/Frugal alternatives — Durable buys and hardship-budget rooms beyond general frugality.
r/NoStupidQuestions alternatives — Curious asks, ELI5 explainers and Reddit-context rooms beyond NSQ.
r/whatisthisthing alternatives — Bug ID, plant ID and tip-of-tongue finds beyond mystery objects.
r/woodworking alternatives — General DIY, finished makes and home repair around woodworking.
r/Baking alternatives — Bread-only and general cooking rooms beyond baking sweets and doughs.
r/solotravel alternatives — General travel, Europe focus and cheap-travel hacks around solo trips.
r/askscience alternatives — Research sharing, history answers and simplified explainers around science Q&A.
r/writing alternatives — Prompt-driven fiction practice beyond craft discussion.
r/Python alternatives — Python learning and general programming Q&A beyond the language hub.
r/anime alternatives — Relatable screenshots and fan art rooms beyond the main anime hub.
r/Android alternatives — iPhone and general gadget rooms around Android news and tips.
r/changemyview alternatives — Hot takes versus willingness-to-revise debate rooms.
r/MechanicalKeyboards alternatives — Full desk setups beyond keyboard hobby news.
r/soccer alternatives — League rooms, world tournament talk and football news beyond the main soccer hub.
r/nfl alternatives — Fantasy leagues, college football, memes and multi-sport news beyond NFL talk.
r/HomeImprovement alternatives — Project showcases, smart-home setups, old houses and decorating beyond text-only repair Q&A.
r/investing alternatives — Ticker talk, personal budgeting, real-estate investing and active trading rooms beyond long-horizon investing.
r/Entrepreneur alternatives — Startup scaling, side income and small-business operations beyond broad entrepreneur networking.
r/houseplants alternatives — Outdoor gardens, indoor edible setups and plant IDs beyond houseplant care.
r/Coffee alternatives — Espresso gear and technique, or tea, when general coffee chat is the wrong room.
r/boardgames alternatives — Tabletop RPGs, miniature painting and chess when modern board-game news is not the goal.
r/fantasyfootball alternatives — Real NFL news and college football when fantasy lineups are not the question.
r/running alternatives — Advanced training mindset and race tactics beyond all-levels running chat.
r/buildapc alternatives — PC culture, part deals and hardware news beyond custom build advice.
r/MakeupAddiction alternatives — Agenda-free tips, science skincare, influencer chatter and deals beyond the main makeup hub.
r/hockey alternatives — NHL-only news and multi-sport highlights beyond all-hockey discussion.
r/baseball alternatives — MLB-centred coverage and multi-sport news beyond all-levels baseball.
r/NintendoSwitch alternatives — Whole-Nintendo news, Zelda, Animal Crossing and 3DS rooms beyond Switch hardware talk.
r/AskHistorians alternatives — Open history discussion, history memes and science Q&A beyond strict AskHistorians answers.
r/bodyweightfitness alternatives — Gym lifting, beginners, strength sports and women-focused fitness beyond calisthenics.
r/EatCheapAndHealthy alternatives — Food photos, budget-only meals, healthy plates and batch prep beyond cheap-and-healthy eating.
r/BuyItForLife alternatives — Spending less day to day when durability shopping is not the question.
r/femalefashionadvice alternatives — Men's fashion, budget women's style, streetwear and vintage looks beyond FFA.
r/backpacking alternatives — Campsite camping, day hikes and pack-hiking trip reports beyond backpacking.
r/cscareerquestions alternatives — General career advice and learning-to-code rooms beyond CS industry careers.
r/webdev alternatives — JavaScript-specific chat and general programming beyond web development.
r/PS5 alternatives — Broader PlayStation chat and PS4 hardware when PS5 news is too narrow.
r/sports alternatives — League homes for NFL, NBA, NHL, MLB and football when multi-sport highlights are too broad.
r/news alternatives — World-only coverage, feel-good headlines and absurd-but-true stories beyond the main news hub.
r/Games alternatives — Casual gaming chat and PC-specific news when quality gaming editorial is not the goal.
r/learnprogramming alternatives — General programming news, CS careers and language-specific learner help beyond any-language beginner Q&A.
r/drawing alternatives — Serious art discussion and absolute-beginner mark-making when general drawing chat is the wrong room.
r/dating_advice alternatives — Ongoing relationships, general dating culture and over-30 dating when short dating-situation advice is not enough.
r/suggestmeabook alternatives — In-depth book discussion and a sibling recommendation room beyond tailored “what next” asks.
r/AmItheAsshole alternatives — A looser interpersonal-conflict sibling when AITA’s stricter format is the wrong fit.
r/Jokes alternatives — Dad-joke format, general humor dumps and “explain this joke” rooms beyond straight joke posts.
r/listentothis alternatives — Broad music chat, indie discovery and genre hubs when deep-cut listening posts are not the goal.
r/tipofmytongue alternatives — Identify a physical object when the forgotten thing is not a title, song or media reference.
r/YouShouldKnow alternatives — Actionable life tips when a “you should know” fact dump is not what you need.
r/javascript alternatives — Full-stack web development chat when the question is not JavaScript/TypeScript-specific.
r/povertyfinance alternatives — Mainstream budgeting and frugality mindset when you are not in a financially strained situation.
r/itookapicture alternatives — Gear/technique talk, film photography and critique-focused rooms beyond posting your own shot.
r/AsianBeauty alternatives — General science-leaning skincare when the products are not specifically Asian beauty.
r/Basketball alternatives — NBA newsroom energy and college hoops when all-leagues playing/watching chat is not enough.
r/rpg alternatives — Modern board games, D&D-only talk and miniature painting when tabletop RPGs broadly are not the point.
r/slowcooking alternatives — General cooking discussion and recipe swaps when the cooker is not a slow cooker.
r/CampingandHiking alternatives — Day hikes and car/campground camping when overnight backpacking with gear is not what you mean.
r/gadgets alternatives — Technology news and industry issues when a single-gadget post is the wrong format.
r/WritingPrompts alternatives — Craft-of-writing discussion when you want technique talk rather than a prompt response.
r/relationships alternatives — High-volume situation advice and early-dating help when structured relationships posting is not the fit.
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r/tattoos alternatives — Design feedback and placement/health questions beyond sharing finished tattoo art.
r/Bitcoin alternatives — Beginner Bitcoin Q&A and multi-coin crypto news when BTC-specific discussion is not enough.
r/ChatGPT alternatives — OpenAI company/research talk and broader ML research when the thread is not ChatGPT product chat.
r/yoga alternatives — Stretching, meditation and mindfulness rooms when general yoga talk is not enough.
r/Meditation alternatives — Yoga, mindfulness and mobility rooms beyond meditation practice talk.
r/flexibility alternatives — Yoga practice and general fitness when stretching is only part of the goal.
r/vegan alternatives — Health-focused food sharing and nutrition science when ethics or lifestyle veganism is not the point.
r/ZeroWaste alternatives — Anti-consumerism and frugal living rooms beyond waste-reduction tips.
r/3Dprinting alternatives — 3D modeling software, electronics and handmade project rooms beyond printer talk.
r/blender alternatives — Game development, 3D printing and digital painting when Blender software is not the point.
r/sewing alternatives — Crochet, general crafts and handmade showcases beyond sewing and garment work.
r/crochet alternatives — Sewing, general crafts and handmade showcases when the project is not on a hook.
r/crafts alternatives — Sewing, crochet and finished DIY showcases when you need a medium-specific room.
r/somethingimade alternatives — Sewing, crochet and general crafts when you need process help, not just a showcase.
r/Filmmakers alternatives — Screenwriting craft and film/TV audience rooms beyond production crew talk.
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r/Watercolor alternatives — Oil, digital and general painting rooms when watercolor media is not required.
r/DigitalPainting alternatives — Traditional painting media and general art discussion beyond digital critique.
r/painting alternatives — Medium-specific watercolor, oil, digital and miniature rooms beyond the general gallery.
r/minipainting alternatives — General and medium-specific painting rooms when the subject is not a miniature.
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r/strength_training alternatives — Bodybuilding, CrossFit and beginner rooms when the strength sport framing is not a fit.
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r/bodybuilding alternatives — Multi-discipline strength training, gym lifting and general Fitness beyond physique sport.
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r/nutrition alternatives — Meal prep, healthful food shares and budget healthy eating beyond nutrition science.
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r/getdisciplined alternatives — Productivity systems and broader self-improvement when discipline habits are only part of the goal.
r/productivity alternatives — Discipline habits, life tips and self-improvement when tooling is not enough.
r/MachineLearning alternatives — Applied data work, general AI chat and singularity talk beyond research-oriented ML.
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r/biology alternatives — General science news and science Q&A when biology-specific discussion is not required.
r/cycling alternatives — The sibling bicycle community when you want the other large bike forum.
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r/TravelHacks alternatives — Budget travel, general travel planning and solo trips when tips-and-tricks is not enough.
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r/streetwear alternatives — Classic menswear advice and sneaker collecting when streetwear style is not the goal.
r/stocks alternatives — Longer-term investing and market commentary when ticker chat is not the goal.
r/manga alternatives — Anime discussion, recommendation rooms and Korean comics when manga reading is not the fit.
r/scifi alternatives — Fantasy literature, worldbuilding and franchise rooms beyond speculative science fiction.
r/Fantasy alternatives — Science fiction, worldbuilding and horror when fantasy reading is not the goal.
r/worldbuilding alternatives — Fantasy and science-fiction fandom when you are consuming worlds rather than building them.
r/PixelArt alternatives — Art learning, general art discussion and drawing practice beyond pixel technique.
r/comics alternatives — Publisher comic-book fandom and Marvel/DC rooms when general comics/webcomics is too broad.
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r/hardware alternatives — PC enthusiast culture, build help and tech news when quality hardware discussion is not the goal.
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r/Outdoors alternatives — Camping, hiking and wilderness survival when general outdoor recreation is too broad.
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r/IndoorGarden alternatives — Houseplants, outdoor gardening and plant ID when indoor growing is not the fit.
r/xxfitness alternatives — General fitness and beginner training when a women/GNC-focused room is not required.
r/snowboarding alternatives — Skiing and general sports when standing sideways on snow is not the activity.
r/skiing alternatives — Snowboarding and general sports when alpine skiing is not the activity.
r/Futurology alternatives — Technology news and hardware when futures studies speculation is not the goal.
r/astrophotography alternatives — Astronomy observing and space news when imaging the sky is not the goal.
r/homelab alternatives — Professional sysadmin work when home lab projects are not the frame.
r/sysadmin alternatives — Home lab projects when professional operations are not the context.