What powers chemcalc.org?
Last seen Aug 2026 · 7 technologies across 5 categories
Analytics
JavaScript frameworks
Miscellaneous
UI frameworks
Web servers
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 78% desktop
- 22% phone
Brazil
United States
Vietnam
India
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.00 / 10 · ranked #1,588,287 of all domains
32 referring domains · OpenPageRank
Core Web Vitals
| LCP | 3.9 s |
| INP | 125 ms |
| CLS | 0.15 |
| TTFB | 1400 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- Weight: 4.5 MB · 78 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Industry: Software and apps (declares
WebApplication)
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on VTX-NETWORK (195.15.0.46)
- DNS: chemexper.com
- Email: chemexper.com
- Email security: SPF (hard fail), no DMARC record
- SSL: Let's Encrypt, RSA 4096, expires Oct 2026
- Common Crawl link graph: rank 596,030, 2 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| chemcalc.org | 5 |
| www.chemcalc.org | 4 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped Google Analytics Aug 2026
- detected Google Analytics Apr 2026
- detected React Router Apr 2026
- detected Umami Apr 2026