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calculator-online.net

https://calculator-online.net· First analyzed 01 May 2026· Updated 01 May 2026
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calculator-online.net
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Mobile

Sponsored

Hosting Provider

Cloudflare
cloudflare.com

IP Address

104.26.0.190

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

austin.ns.cloudflare.com.jule.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
458 ms10%
Speed Index
595 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
797 KB
74 requests

Image Optimization

Lazy LoadWebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Cloudflare
CDN
Cloudflare

Technology Stack

6 Technologies Detected

Advertising

2
Google AdsGoogle AdSense

CSS Frameworks

1
Tailwind CSS

Analytics

1
Microsoft Clarity

Reviews

1
Trustpilot

CDN

1
Cloudflare

SEO Analysis

C68/100
21
7
0
Meta Tags14/15
Content10/12
Headings8/8
Technical19/25
E-E-A-T0/7
Images6/7
Links2/5
URL5/5
Social0/5
Freshness0/4
Mobile1/4
Indexability3/3
C
calculator-online.netcalculator-online.net

Calculator Online - 100% Free, Reliable & Accurate Calculators

The 100% free and reliable online calculators that help you to solve any calculation-related problems and provides you with the precise measurements.

Title Length62 chars

Recommended: 50-60 chars (~365px / 580px)

Description Length149 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    1,036 URLs

    robots.txt

    5 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    16/100
    Poor
    5 12 2

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

    Sponsored

    AI & LLM Readiness

    D40/100
    Bot Access
    20/25
    Machine Read.
    12/25
    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.txtinvalid
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    Text ratio:4%
    Words:2,198
    Token eff.:Optimal

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary24w
    Descriptive Headingsavg 2.3w
    Canonical URL
    Open Graph0/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (12)
    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.
    C
    64/100
    9
    Passed
    5
    Critical
    2
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    14/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    10/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    15/15
    Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
    Keyboard & Focus
    3/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    2/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    3 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.
    60/100
    B
    81 mg
    CO₂e / view
    797.5 KB
    Page Weight
    80%
    Cleaner Than
    New Visitor
    92 mg
    vs
    Returning (cached)
    46 mg
    Annual (10K/mo)
    9.7 kg
    Emission Segments
    Data Center
    4 mg
    Network
    24 mg
    Device
    53 mg
    Resource Breakdown
    JavaScript
    510.2 KB
    Images
    106.1 KB
    CSS
    34.8 KB
    HTML
    37.4 KB
    Other
    108.9 KB
    Green Hosting Verified
    Cloudflare
    GWF Verified
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    26%Critical
    Interactive

    HTTPS

    WAF

    44d

    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

    17.03.2026

    Valid Until

    15.06.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    calculator-online.net*.calculator-online.net

    SHA-256 Fingerprint

    DE:C4:E7:C0:0B:52:93:D3:D3:0A:54:D9:63:C1:51:B6:6B:69:A9:D6...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    age
    0
    alt-svc
    h3=":443"; ma=86400
    cache-control
    🔴 No Cache(no-cache, private)
    cf-cache-status
    DYNAMIC
    cf-ray🇮🇹 Milan
    9f4f36c82ed45262-MXP
    content-encoding
    ⚡ Brotli(br)
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    65

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (5)

    alt1.aspmx.l.google.com
    alt4.aspmx.l.google.com
    alt3.aspmx.l.google.com
    alt2.aspmx.l.google.com

    +1 more

    Domain Information

    calculator-online.net

    Domain Age
    12y 5m

    Created

    13.11.2013

    Expires

    13.11.2026

    Last Updated

    14.10.2025

    Registrar

    NameCheap, 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
    Data Protection Officer mentioned

    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.
    B
    71/100
    Mobile Friendly9 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=1.0
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Lato

    WCAG Partial
    65/100
    Readability
    /30
    16/30

    17px · LH 1.88

    Hierarchy
    /20
    15/20

    2.35x ratio · ✓ H1→H6

    WCAG
    /25
    16/25

    1:1 min contrast

    Performance
    /25
    18/25

    1 font · 1 req

    Heading Font

    Lato

    Sans40px

    Body Font

    Lato

    Sans17px

    Contrast Ratio

    1:1

    5 issues

    Reading Comfort

    ~36 CPL

    Narrow lines
    40px
    h1
    32px
    h2
    17px
    p

    ✅ Excellent readability: 17px body text is ideal for all devices.

    ⚠️ Wide line spacing (1.88). 1.4–1.6 is optimal for body text.

    ❌ Very complex text: Flesch score 16/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 5 elements below WCAG AA threshold (min 1.0:1).

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

    ✅ Strong hierarchy: Headlines are 2.4x larger than body text.

    Buy on MyFontsFlesch 17

    Color Palette

    8 unique colors
    Light
    #ffffff
    Background· 76.50000000000001%
    #0c547e
    Primary· 6.5%
    #b8d7e3
    Secondary· 6.2%
    #3e6a85
    Secondary· 3.4%
    #c0c9cd
    Border· 2.1%
    #98bdce
    Secondary· 1.6%
    #d9e5e9
    Secondary· 1.5%

    Business & Marketing Stack

    4 Tools Detected

    Enterprise

    Behavior Analytics

    2
    Microsoft ClarityFree
    Google AnalyticsFree

    User behavior and product analytics

    Advertising

    1
    Google AdsEnterprise

    Ad platforms and retargeting pixels

    A/B Testing & Optimization

    1
    ConvertMid-Market

    Experimentation and conversion optimization

    3

    Categories

    4

    Total Tools

    1

    Enterprise

    1

    Mid-Market

    Assessment: Sophisticated marketing and sales technology infrastructure

    Ad Networks

    Google AdSenseGoogle Ad ManagerAmazon Publisher ServicesPrebid.js

    Sponsored

    Scripts & Styles

    22 Resources

    20
    Scripts
    2
    Styles
    16
    Async
    1
    Defer

    Top Script Sources

    cdn.snigelweb.com(4)pagead2.googlesyndication.com(2)securepubads.g.doubleclick.net(2)cdn1.anonymised.io(2)static.anonymised.io(1)

    Website Identity

    calculator-online.net

    12 years old
    Location detected: 🇨🇦 Canadavia ip
    NameCheap, Inc.📧 Google Workspaceen

    Sponsored

    Last analyzed: 01 May 2026 at 13:43

    Historical Analysis & Change Tracking

    calculator-online.net Technology Stack - Built With Tailwind CSS, Microsoft Clarity, Google Ads, Google AdSense, Trustpilot | StackOptic | StackOptic