🌐 calculator.com 200 🔒 SSL Valid
Checked: just now 🔗 Visit site
✨ About this site
This long-standing website provides a comprehensive collection of free online calculators covering math, finance, health, science, and everyday needs. Operating since 1996, it is a widely recognized and frequently visited destination for students, professionals, and the general public.
📊 What the data says
This website is approximately 30 years old and currently returns an HTTP 200 status. It utilizes a technology stack that includes PHP, jQuery, Bootstrap, and Font Awesome, hosted on Cloudflare infrastructure. The site maintains a valid SSL certificate that expires on November 29, 2026.
HTTP Status ?A three-digit code showing if the site loaded successfully (200), redirects (301/302), or has errors (4xx/5xx).Read more →
200
SSL Expires ?When the SSL certificate expires. An expired certificate causes browser security warnings.Read more →
in 33d
Domain Expires ?When the domain registration expires. If not renewed, the domain becomes available to others.Read more →
in 90d
Hosting ?The company and location where this website's server is physically located.Read more →
Unknown
Security ?Score based on key HTTP security headers: HSTS, Content-Security-Policy, and X-Frame-Options.Read more →
0/3
IP Address ?The numerical address of the server hosting this website. Reveals location, provider, and network.Read more →
172.67.185.20
Performance ?Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability.
58 mob
Uptime
100%
⚡ Performance ?Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability. 58
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Mobile
58
Score
91
Accessibility
81
Best Practices
100
SEO
LCP 8.73s
CLS 0.000
FCP 7.64s
TTFB 0.08s
TBT 3ms
SI 7.64s
Desktop
100
Score
91
Accessibility
100
Best Practices
100
SEO
LCP 0.49s
CLS 0.002
FCP 0.49s
TTFB 0.03s
TBT 0ms
SI 0.72s
Checked: 2026-10-26 23:07:33.166626 · View on PageSpeed
🛠️ Tech Stack ?Technologies detected on this website: CMS, frameworks, libraries, CDN, and analytics tools. 5
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🌐 CDN
Cloudflare
🎨 CSS Framework
Bootstrap
🔤 Font/Icon
Font Awesome
📦 JS Library
jQuery
💻 Language
PHP 8.0.30
📸 Screenshot Processing...
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⏳

Screenshot is being captured...

🌐 DNS Records ?DNS translates domain names to IP addresses. Records control where the site, email, and services are directed.Read more →
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A (IPv4)104.21.64.122172.67.185.20
AAAA (IPv6)2606:4700:3030::ac43:b9142606:4700:3035::6815:407a
NSsara.ns.cloudflare.comclark.ns.cloudflare.com
MX5 mail.calculator.com
TXT (4)
Services configured via TXT:
Google3
Show all TXT records
google-site-verification=PCC_HXEg6Z6UP8XQ8SXM6pQ52tVZI0GTHJ_3RS2FNOE
google-site-verification=XpuuZPbZzIuGwWwYMO6U3KHgUr7fl8V5db-47CbzLL4
google-site-verification=rEpHib42SWQ675Kt_hpsf61jUrTdHDofiQbO2VADlNc
v=spf1 ip4:174.143.201.16 ip6:2001:4800:7821:101:be76:4eff:fe03:665e -all
📋 WHOIS / RDAP ?Public registration data: who registered the domain, when, and when it expires.Read more →
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RegistrarGoDaddy.com, LLC
Registered1996-01-24
Expires2027-01-25 (in 90 days)
Last Updated2025-01-26
Statusclient delete prohibitedclient renew prohibitedclient transfer prohibitedclient update prohibited
🔒 SSL Certificate ?Encrypts the connection between browsers and this website. Valid SSL = HTTPS works.Read more → Valid
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Subject (CN)calculator.com
IssuerGoogle Trust Services
Valid From2026-08-31
Valid Until2026-11-29 (33 days left)
SANs (2)calculator.com*.calculator.com
📡 HTTP Headers ?Metadata sent by the server: reveals software, caching rules, and security configuration.Read more →
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Status200
Servercloudflare
Content-Typetext/html; charset=UTF-8
Final URLhttps://calculator.com/
x-powered-byPHP/8.0.30
cache-controlno-store, no-cache, must-revalidate
cf-raya50db916ec06a14d-IAD
Security headers ?HTTP headers that protect visitors from attacks. HSTS forces HTTPS, CSP controls resource loading, X-Frame-Options prevents clickjacking.Read more →
HSTS
Content-Security-Policy
X-Frame-Options
🏠 Hosting ?Physical infrastructure: where the server is, who operates it, and what network it belongs to.Read more →
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IP Address172.67.185.20
ProviderUnknown
OrganizationN/A
ASNN/A
LocationN/A
🛡️ Security Score F (1/7)
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Valid SSL
HSTS
CSP
X-Frame-Options
X-Content-Type
Referrer-Policy
Permissions-Policy
🗺️ Sitemap & Robots
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Open to search engines
This site's robots.txt lets crawlers access its main content. Search engines can index it normally.
No paths are disallowed — everything is crawlable.
Sitemap Found 222 pages
Last modified 2026-08-24
🔗 Social & Meta Tags Complete
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Title...calculate anything, anytime, anywhere. | calculator.com
DescriptionFree online calculators for math, finance, health, science, conversions, graphing, education, and everyday calculations. Calculate anything, anytime, anywhere.
OG Title...calculate anything, anytime, anywhere.
OG DescriptionFree online calculators for math, finance, health, science, conversions, graphing, education, and everyday calculations. Calculate anything, anytime, anywhere.
OG Typewebsite
OG Site Namecalculator.com
Twitter Cardsummary_large_image
Canonical URLhttps://calculator.com/
Languageen
📧 Mail Security ?Email authentication records (SPF & DMARC) that prevent spoofing and phishing from this domain.Read more →
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SPF✓ Present
v=spf1 ip4:174.143.201.16 ip6:2001:4800:7821:101:be76:4eff:fe03:665e -all
DMARC✓ Present
v=DMARC1; p=quarantine;
MX Records
5 → mail.calculator.com
🌍 Other TLDs ?Other top-level domain variants of this domain name and their availability. 22 active 1 for sale
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.net ●
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.info ●
.io ●
.co ●
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.xyz taken
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📡 Uptime Monitor
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Current Status 🟢 Online
HTTP Status 200
Response Time 109ms
Last Checked 2026-10-26 08:45:55.292269
Uptime (30d) 100%