What powers calctool.org?

Last seen Jun 2026 · 9 technologies across 7 categories

Analytics

Google Analytics vUA
since Dec 2021

Email

Mailgun
since Aug 2022

Issue trackers

Sentry v5.7.1
since Aug 2022

JavaScript frameworks

React
since Aug 2022

JavaScript libraries

core-js v3.9.1
since Aug 2022
Loadable-Components
since Aug 2022
Lodash v4.17.21
since Aug 2022

Miscellaneous

Open Graph
since Sep 2022

Recruitment & staffing

Freshteam
since Aug 2022

Audience

  • 61% phone
  • 39% desktop
  • United States
  • India
  • United Kingdom
  • Indonesia
  • Canada
  • Australia

Countries where the site has Chrome traffic, strongest markets first.

Open Page Rank

3.71 / 10 · ranked #758,618 of all domains

66 referring domains · OpenPageRank

Core Web Vitals

LCP1.6 s
INP150 ms
CLS0
TTFB900 ms

Real user p75, Chrome UX Report, Jun 2026.

Page

  • Language: English
  • CDN: KeyCDN
  • Weight: 1.8 MB · 91 requests
  • Structured data: OpenGraph

Homepage as crawled by the HTTP Archive, Jul 2026.

Full technology history →
Report an incorrect detection

Recent changes

Look up any website for free

No paywall, no lead-gen, no account. Paste a domain and see what powers it.

No account neededHistory since 2018