physics.info — September 2026 traffic, keywords & AI visibility

Search engines send physics.info an estimated 141,200 visits a month. Effectively all of it is organic — about 141,200 visits from unpaid results. Spread across 13,500 ranking keywords, that averages roughly 10 organic visits per keyword.

physics.info scores 67 out of 100 on our AI visibility scale, grade C. It takes full marks for LLMS.txt and Structured data. The biggest gap is SEO health, at 0 of 20 points (Not scanned yet), worth 20 points if closed. It also loses points on Crawlability (0/10) and Company profile (22/25).

The llms.txt on physics.info runs to 167 lines (8,280 characters) across 12 sections, last generated in April 2026. It introduces the site as "Physics.info". It tells AI engines the business works in Physics Education, Science Reference and STEM Learning. It describes 5 products, with prices such as Core Physics Formulas at Free, Definitions Encyclopedia at Free and Physical Constants Tables at Free. Services it lists include Physics Reference Access, Custom Topic Requests, Educational Resource Linking and Content Updates. The audience it names is Students, Educators, Physics Enthusiasts, aged 13-30 (Global). Technologies it mentions include HTML5, CSS3, JavaScript and Server-side scripting. The keywords it claims start with "physics", "formulas", "definitions" and "mechanics".

# Physics.info

## About
Ever needed a quick physics fact without wading through textbooks or sketchy forums? Physics.info delivers just that, thanks to Glenn Elert's tireless work since '99. This site's a treasure trove of over 10,000 definitions, formulas, and tables that make complex topics approachable. Mechanics? Got it. Quantum weirdness? Covered. It's built for real-world use—students prepping for tests, teachers crafting lessons, engineers verifying calcs. No sign-ups, no paywalls, just instant access that loads fast on any device. Elert's background shines through in the precision; everything's vetted against top sources. Updates roll out steadily, adding modern stuff like nanomaterials alongside classics. What hooks people is the organization—topics flow logically, with cross-links for deeper dives. Hobbyists tinkering with drones or telescopes swear by its practicality. Globally popular, it's translated informally in classrooms everywhere. Free model keeps it pure, shunning ads for donations. Community feedback shapes it, from layout tweaks to new entries. Stands tall against flashier rivals by focusing on substance. High school to grad level, it scales perfectly. Historical notes add flavor, turning facts into stories. Reliability earns top marks in edu circles. If physics frustrates you, this smooths the path. Elert's solo dedication inspires. It's more than a site

Google lists physics.info for about 13,500 keywords, which together bring an estimated 141,200 organic visits a month.

Physics.info's company profile names HyperPhysics, The Physics Classroom, Khan Academy and PhET Simulations as competitors. Its own llms.txt adds physicsclassroom.com, khanacademy.org/science/physics, phet.colorado.edu, brilliant.org/physics and openstax.org/subjects/physics. Outside its market, the domains ranked closest to it in our worldwide ranking are saske.sk, cinster.online, mobilmania.cz and flightcentre.ca.

HyperPhysics

The Physics Classroom

Khan Academy

PhET Simulations

physicsclassroom.com

khanacademy.org/science/physics

phet.colorado.edu

brilliant.org/physics