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calculators.hk

https://calculators.hk· First analyzed 22 May 2026· Updated 22 May 2026
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calculators.hk
Desktop screenshot of calculators.hk
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Mobile

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Hosting Provider

Hetzner
hetzner.com

IP Address

37.27.135.61

Site Location

🇭🇰 Hong Kongvia tld

Server Location

🇫🇮 Helsinki, Finland

ASN

AS24940

Organization

Hetzner Online GmbH

Server

BunnyCDN-BO1-1163

CDN

CDN

Nameservers

clara.ns.cloudflare.com.igor.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

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

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
Hetzner
CDN
CDN

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

12 Technologies Detected

Analytics

4
Google Analytics
Google Analytics 4
MatomoClicky

Advertising

3
Google AdsGoogle AdSenseCriteo

CSS Frameworks

2
Bootstrapv4.6.2
Tailwind CSS

Libraries

1
jQueryv3.6.0

Icon Libraries

1
Font Awesome

CDN

1
Bunny CDN

SEO Analysis

C60/100
16
8
1
Meta Tags5/15
Content11/12
Headings8/8
Technical19/25
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile3/4
Indexability3/3
C
calculators.hkcalculators.hk

免費線上計算機 | Calculators.hk

Calculators.hk 提供多種實用的免費線上計算機。使用我們簡單易用的計算機，簡化您的計算。

Title Length24 chars

Recommended: 50-60 chars (~140px / 580px)

Description Length53 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (11/11) — critical for accessibility and SEO

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

2,105 URLs

robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

6/100
Poor
2 13 2

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.
11/25
Schema Data
0/25
Citation
10/25

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:2%
Words:530
Token eff.:Optimal
Sections/1K:147.2
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary90w
Descriptive Headingsavg 1.7w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
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
76/100
12
Passed
2
Critical
2
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
17/20
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
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
5/15
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.
56/100
B
81 mg
CO₂e / view
806.2 KB
Page Weight
80%
Cleaner Than
New Visitor
93 mg
vs
Returning (cached)
47 mg
Annual (10K/mo)
9.8 kg
Emission Segments
Data Center
4 mg
Network
24 mg
Device
54 mg
Resource Breakdown
JavaScript
639.3 KB
Images
1.8 KB
CSS
44.7 KB
HTML
22.5 KB
Other
97.9 KB
Green Hosting Verified
Hetzner Online GmbH
GWF Verified
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

82d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

14.05.2026

Valid Until

12.08.2026

Subject Alternative Names (1)

calculators.hk

SHA-256 Fingerprint

CD:61:E9:20:EB:9E:AE:68:AC:39:79:F3:6A:96:E2:46:3E:18:D9:A7...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🔵 1 Week(public, max-age=604800)
cdn-cache
MISS
cdn-cachedat
05/22/2026 01:38:14
cdn-edgestorageid
1163
cdn-proxyver
1.53
cdn-pullzone
3555726
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

20

SPF
DKIM
DMARC

MX Records (1)

mail.calculators.hk

Domain Information

calculators.hk

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

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
77/100
Mobile Friendly6 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
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

-apple-system

WCAG AA
89/100
Readability
/30
28/30

16px · LH 1.50

Hierarchy
/20
18/20

2.5x ratio · ✓ H1→H6

WCAG
/25
21/25

4.5:1 min contrast

Performance
/25
22/25

System fonts

Heading Font

-apple-system

Sans40px

Body Font

-apple-system

Sans16px

Contrast Ratio

4.5:1

WCAG AA (≥4.5:1)

Reading Comfort

~43 CPL

Narrow lines
40px
h1
22px
h2
16px
h3
16px
p

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

✅ Easy to read: Flesch score 81/100 — accessible to general audiences.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.5:1).

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

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

Flesch 81

Color Palette

6 unique colors
Light
#ffffff
Background· 83.2%
#9ca6ae
Primary· 4%
#983ca9
Secondary· 3.7%
#c2d6e5
Secondary· 3.4%
#e7e4e0
Secondary· 2.4%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

2
Matomo (Piwik)Mid-Market
Google AnalyticsFree

User behavior and product analytics

Advertising

1
Google AdsEnterprise

Ad platforms and retargeting pixels

2

Categories

3

Total Tools

1

Enterprise

1

Mid-Market

Assessment: Well-developed marketing technology stack

Ad Networks

Google AdSenseGoogle Ad ManagerAmazon Publisher ServicesPubMaticOpenXPrebid.js

Sponsored

Scripts & Styles

24 Resources

20
Scripts
4
Styles
14
Async
0
Defer

Top Script Sources

securepubads.g.doubleclick.net(3)cdn.hadronid.net(2)pagead2.googlesyndication.com(2)cmp.inmobi.com(2)cdn1.anonymised.io(2)

Website Identity

calculators.hk

Location detected: 🇭🇰 Hong Kongvia tld
zh-HK

Sponsored

Last analyzed: 22 May 2026 at 01:38

Historical Analysis & Change Tracking