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calculat.io

https://calculat.io· First analyzed 05 May 2026· Updated 05 May 2026
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calculat.io
Desktop screenshot of calculat.io
Mobile screenshot of calculat.io
Mobile

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Hosting Provider

Cloudflare
cloudflare.com

IP Address

104.26.10.203

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

meilani.ns.cloudflare.com.guss.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
411 ms10%
Speed Index
534 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
454 KB
32 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
Infrastructure
Hosting
Cloudflare
CDN
Cloudflare

Progressive Web App

PWA ReadyWeb ManifestService WorkerApple Touch IconTheme Color

Technology Stack

5 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

CSS Frameworks

1
Tailwind CSS

Advertising

1
Google Ads

CDN

1
Cloudflare

SEO Analysis

C66/100
20
8
0
Meta Tags5/15
Content8/12
Headings8/8
Technical20/25
E-E-A-T0/7
Images5/7
Links4/5
URL5/5
Social5/5
Freshness0/4
Mobile3/4
Indexability3/3
C
calculat.iocalculat.io

Calculatio - Home

Please select your language

Title Length17 chars

Recommended: 50-60 chars (~101px / 580px)

Description Length27 chars

Recommended: 120-160 chars

Issues (0)

    8 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    481 URLs

    481 sub-sitemaps

    robots.txt

    6 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    12/100
    Poor
    4 12 1

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    D41/100
    Bot Access
    20/25
    Machine Read.
    13/25
    Schema Data
    0/25
    Citation
    8/25

    AI Bot Access

    14/14 accessible
    AI Search
    OAI-SearchBot
    PerplexityBot
    Claude-SearchBot
    Gemini-Deep-Research
    DuckAssistBot
    Training
    GPTBot
    ClaudeBot
    Google-Extended
    Meta-ExternalAgent
    Bytespiderinfo
    Amazonbot
    Applebot-Extended
    CCBotinfo
    Fetch
    ChatGPT-User

    Machine Readability

    llms.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    nav
    Text ratio:6%
    Words:2,590
    Token eff.:Optimal
    Sections/1K:0.4
    Depth:1/5

    Structured Data

    1 JSON-LD

    Citation Readiness

    Opening Summary544w
    Descriptive Headingsavg 1.4w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (9)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    Accessibility

    WCAG 2.1 Compliance

    Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
    A
    84/100
    14
    Passed
    1
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    20/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    15/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    14/15
    Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
    Keyboard & Focus
    11/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    4/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    2 recommendations
    • •Accessibility recommendation preview...
    Upgrade to view recommendations

    Carbon Footprint

    SWDM v4 · Eco-Score

    Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
    77/100
    A
    46 mg
    CO₂e / view
    453.6 KB
    Page Weight
    90%
    Cleaner Than
    New Visitor
    52 mg
    vs
    Returning (cached)
    26 mg
    Annual (10K/mo)
    5.5 kg
    Emission Segments
    Data Center
    2 mg
    Network
    14 mg
    Device
    30 mg
    Resource Breakdown
    JavaScript
    308.9 KB
    Images
    10.9 KB
    Fonts
    81.9 KB
    HTML
    28.6 KB
    Other
    23.3 KB
    Green Hosting Verified
    Cloudflare
    GWF Verified
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    D

    Security Score

    41%Poor
    Interactive

    HTTPS

    WAF

    57d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Google Trust Services

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-256

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2+H3

    Valid From

    03.04.2026

    Valid Until

    02.07.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    calculat.io*.calculat.io

    SHA-256 Fingerprint

    E5:77:32:62:9B:D4:FC:BF:63:C9:80:BA:FC:41:5D:05:1A:E5:35:F9...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    age
    33645
    alt-svc
    h3=":443"; ma=86400
    cache-control
    🔵 1 Days(public, max-age=86400)
    cf-cache-status
    HIT
    cf-ray🇮🇹 Milan
    9f73548f5c25e3b2-MXP
    content-encoding
    ⚡ Brotli(br)
    Good Warning Issue

    Email Infrastructure

    Zoho Mail

    Score

    68

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (3)

    mx2.zoho.eu
    mx3.zoho.eu
    mx.zoho.eu

    Domain Information

    calculat.io

    Domain Age
    8y 3m

    Created

    18.01.2018

    Expires

    18.01.2027

    Last Updated

    23.11.2025

    Registrar

    URL Solutions, Inc.

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Quantcast Choice

    Cookie Consent Banner
    Quantcast Choice
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Quantcast Choice
    Privacy policy page linked

    Mobile Compatibility

    Viewport & Responsive Test

    Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
    A
    87/100
    Mobile Friendly20 breakpoints
    Viewport Meta
    The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
    Responsive Design
    Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
    Touch Icons
    Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
    Readable Font Size
    Base font size should be at least 16px on mobile to ensure text is readable without zooming.
    Relative Units
    Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
    No H-Scroll Risk
    No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
    Tap Targets OK
    Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
    No Fixed Widths
    No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
    Viewport
    width=device-width, initial-scale=1
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Inter

    WCAG Fail
    69/100
    Readability
    /30
    16/30

    12px · LH 1.33

    Hierarchy
    /20
    20/20

    2.5x ratio · ✓ H1→H6

    WCAG
    /25
    15/25

    1:1 min contrast

    Performance
    /25
    18/25

    1 font · 3 req

    Heading Font

    Inter

    Sans30px

    Body Font

    Inter

    Sans12px

    Contrast Ratio

    1:1

    1 issue

    Reading Comfort

    Single Font Family

    left aligned
    30px
    h1
    24px
    h2
    14px
    h3
    12px
    p

    ❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

    ⚠️ Tight line spacing (1.33). Increase to 1.4–1.6 for better readability.

    ❌ Low contrast: 1 elements fail WCAG AA (min 1.0:1). Increase text/background contrast.

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ✅ Strong hierarchy: Headlines are 2.5x larger than body text.

    ✅ Lean font stack: 1 font families keeps load times fast.

    Buy on MyFontsFlesch 51

    Color Palette

    4 unique colors
    Light
    #ffffff
    Primary· 13.5%
    #2367ad
    Accent· 8.4%
    #57a2e4
    Accent· 1.7%

    Business & Marketing Stack

    1 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    1

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Ad Networks

    Google Ad ManagerPrebid.js

    Sponsored

    Scripts & Styles

    12 Resources

    12
    Scripts
    0
    Styles
    10
    Async
    0
    Defer

    Top Script Sources

    a.pub.network(3)cdn.privacy-mgmt.com(3)googletagmanager.com(2)securepubads.g.doubleclick.net(2)google-analytics.com(1)

    Website Identity

    Calculatio - Home

    Please select your language

    info@calculat@@io
    8 years old
    Location detected: 🇨🇦 Canadavia ip
    URL Solutions, Inc.📧 Zoho Mailen

    Sponsored

    Last analyzed: 05 May 2026 at 22:55

    Historical Analysis & Change Tracking