What powers 
medcalc.org?
Last seen Aug 2026 · 11 technologies across 9 categories
Analytics
CDN
Ecommerce
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Miscellaneous
Performance
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Security
Webmail
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 found
- ai.txt not found
- Aug 2026 llms.txt appeared
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| calc | #18 | 2,700 |
| cosh function | #4 | 1,500 |
| intracluster correlation coefficient | #37 | 770 |
| exponential function calculator | #4 | 720 |
| t chart statistics | #3 | 430 |
| t distribution table | #6 | 410 |
| risk ratio calculator | #1 | 400 |
| ln graph | #5 | 380 |
| x2 test calculator | #6 | 340 |
| whitney test | #7 | 310 |
| atan function | #1 | 300 |
| relative risk calculator | #1 | 300 |
| t test value table | #4 | 290 |
| p value calculator | #9 | 270 |
| cosh calculator | #1 | 270 |
| how do you calculate relative risk | #2 | 260 |
| how to calculate relative risk | #2 | 260 |
| student t table | #8 | 240 |
| atan | #4 | 240 |
| bland altman plot | #3 | 230 |
| hyperbolic tangent function | #3 | 230 |
| gamma calculator | #1 | 220 |
| t test values table | #4 | 220 |
| int x | #2 | 210 |
| chi square value table | #10 | 210 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
No AI crawlers blocked
Standards: llms.txt
Audience
- 73% desktop
- 26% phone
- 1% tablet
United States
India
United Kingdom
Bangladesh
Malaysia
Indonesia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.43 / 10 · ranked #167,853 of all domains
223 referring domains · OpenPageRank
Search traffic
29,200 est. monthly organic visits (US)
7,467 keywords in Google's top 30
Core Web Vitals
| LCP | 1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- CDN: Cloudflare
- Weight: 0.1 MB · 20 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Cloudflare (104.21.22.17, IPv6)
- DNS: Cloudflare DNS
- Email: Microsoft 365
- Email security: no SPF record, no DMARC record
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Nov 2026
- Common Crawl link graph: rank 527,905, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.medcalc.org | 9 |
| medcalc.org | 8 |
Full technology history →
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Recent changes
- detected PHP Jun 2026