r/AskPhysics

Updated 2026-10-24

r/AskPhysics is a Communities & Discussion community on Reddit with 1,556,879 members, ranking #83 of 6,870 in Communities & Discussion. /r/AskPhysics exists to answer questions about physics. * Questions should be relevant, and answers should be on-topic and correct. * We don't condone cheating on school work, and homework questions should be handled [according to these guidelines.](https://www.reddit.com/r/AskPhysics/comments/563dcm/meta_yes_homework_questions_are_ok_heres_how_to/) * Incivility will not be tolerated. * If your qu

1,556,879 membersCommunities & Discussion#83 in category
Visit r/AskPhysics on Reddit →

How big is r/AskPhysics?

Created in 2011, r/AskPhysics has had over a decade to grow and is a major community by Reddit standards. Within Communities & Discussion it ranks #83 of 6,870 communities we track — the top 1.2% of the category by subscriber count. That puts it about 509× the median Communities & Discussion subreddit, which has 3,056 members. It is a work-safe community with no 18+ flag on Reddit.

For scale, the largest Communities & Discussion community we track is r/AskReddit with 59,202,832 members — roughly 38 times the size of r/AskPhysics. Reddit itself launched in 2005, so a subreddit created in 2011 sits in the middle wave of community building on the platform. Subscriber counts indicate reach, not activity — a large community can be quiet, and a smaller one busy. Open r/AskPhysics on Reddit to see how often people actually post before deciding whether it is worth joining.

Members1,556,879
CategoryCommunities & Discussion
Rank in category#83 of 6,870
Created2011
Category median size3,056 members
Content ratingWork-safe (SFW)

Similar Communities & Discussion subreddits by size

Largest Communities & Discussion communities

Subscriber counts come from the public Reddit API and are refreshed when this directory is rebuilt. Redditory is not affiliated with Reddit Inc.

← All Communities & Discussion subreddits