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drcalculator.com

https://drcalculator.com· First analyzed 03 Jun 2026· Updated 03 Jun 2026
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drcalculator.com
Desktop screenshot of drcalculator.com
Mobile screenshot of drcalculator.com
Mobile

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Hosting Provider

netcup GmbH

IP Address

202.61.241.126

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Nuremberg, Germany

ASN

AS197540

Organization

netcup GmbH

Server

BunnyCDN-IL1-1235

CDN

CDN

Nameservers

coco.bunny.net.kiki.bunny.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
408 ms10%
Speed Index
530 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2 KB
2 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
netcup GmbH
CDN
CDN

Technology Stack

1 Technologies Detected

CDN

1
Bunny CDN

SEO Analysis

D52/100
16
7
0
Meta Tags5/15
Content5/12
Headings8/8
Technical19/25
E-E-A-T0/7
Images0/7
Links3/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
D
drcalculator.comdrcalculator.com

Dr Calculator

Financial calculators including Karl's Mortgage Calculator

Title Length13 chars

Recommended: 50-60 chars (~76px / 580px)

Description Length58 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    70 URLs

    robots.txt

    108 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    8/100
    Poor
    3 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

    F13/100
    Bot Access
    3/25
    Machine Read.
    5/25
    Schema Data
    1/25
    Citation
    4/25

    AI Bot Access

    0/14 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
    Text ratio:22%
    Words:119
    Token eff.:Too Short
    Sections/1K:67.2

    Structured Data

    Microdata
    WebSite(min)microdata

    Citation Readiness

    Opening Summary
    Descriptive Headingsavg 1w
    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.
    B
    74/100
    10
    Passed
    3
    Critical
    0
    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
    15/15
    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
    9/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    1/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    1 recommendation
    • •Accessibility recommendation preview...
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    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.
    76/100
    A+
    <0.001 g
    CO₂e / view
    2.2 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    <0.001 g
    vs
    Returning (cached)
    <0.001 g
    Annual (10K/mo)
    24 g
    Emission Segments
    Data Center
    <0.001 g
    Network
    <0.001 g
    Device
    <0.001 g
    Resource Breakdown
    CSS
    723 B
    HTML
    1.5 KB
    Green Hosting Verified
    netcup GmbH
    GWF Verified
    2 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A+

    Security Score

    91%Excellent
    Static / Informational

    HTTPS

    No WAF

    72d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-384

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    16.05.2026

    Valid Until

    14.08.2026

    Subject Alternative Names (1)

    www.drcalculator.com

    SHA-256 Fingerprint

    82:48:E3:73:C3:F0:CC:26:90:CE:82:42:31:5F:4D:FD:81:0D:1C:4A...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    access-control-allow-origin
    https://www.drcalculator.com
    cache-control
    🔵 1 Days(public, max-age=86400)
    cdn-cache
    HIT
    cdn-cachedat
    05/17/2026 11:18:07
    cdn-edgestorageid
    1346
    cdn-proxyver
    1.53
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    55

    SPF
    DKIM
    DMARC

    DMARC Policy

    Reject (Strictest)

    Domain Information

    drcalculator.com

    Domain Age
    21y 8m

    Created

    28.09.2004

    Expires

    28.09.2034

    Last Updated

    16.05.2026

    Registrar

    Blacknight Internet Solutions Ltd.

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    GDPR Indicators

    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.
    D
    52/100
    Mobile Friendly
    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
    3 recommendations
    • •Mobile compatibility recommendation preview...
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    Typography & Readability

    sans-serif

    WCAG AAA
    75/100
    Readability
    /30
    20/30

    16px · LH --

    Hierarchy
    /20
    17/20

    1.5x ratio · ✓ H1→H6

    WCAG
    /25
    24/25

    9.07:1 min contrast

    Performance
    /25
    14/25

    0 fonts

    Heading Font

    sans-serif

    Sans24px

    Body Font

    sans-serif

    Sans16px

    Contrast Ratio

    9.07:1

    WCAG AAA (≥7:1)

    Reading Comfort

    Single Font Family

    left aligned
    24px
    h1
    24px
    h2
    16px
    p
    Minor Second
    Scale

    ✅ Excellent readability: 16px body text is ideal for all devices.

    ❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

    ✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.1:1).

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

    ✅ Lean font stack: 0 font families keeps load times fast.

    ⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

    Flesch 0

    Color Palette

    7 unique colors
    Light
    #ffffff
    Background· 88.20000000000002%
    #9799d8
    Primary· 3.7%
    #b8b8de
    Secondary· 1.9%
    #7f7cc7
    Secondary· 1.8%
    #dcdcec
    Secondary· 1.6%
    #bdd8ef
    Accent· 1.5%

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    Scripts & Styles

    1 Resources

    0
    Scripts
    1
    Styles
    0
    Async
    0
    Defer

    Top Script Sources

    Website Identity

    drcalculator.com

    [email protected]
    21 years old
    Location detected: 🇩🇪 Germanyvia ip
    Blacknight Internet Solutions Ltd.en

    Sponsored

    Last analyzed: 03 Jun 2026 at 07:19

    Historical Analysis & Change Tracking