calculators.org

https://calculators.org· First analyzed 05 May 2026· Updated 05 May 2026

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calculators.org

Mobile

Sponsored

Hosting Provider

pair Networks

IP Address

216.92.63.2

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Pittsburgh, United States

ASN

AS7859

Organization

pair Networks

Server

Apache

Nameservers

ns8.ns0.com.dns4.pair.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.0 s10%

Speed Index

1.3 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.7 MB

74 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

peekabooCustom

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

12 Technologies Detected

Libraries

CSS Frameworks

Analytics

Facebook Pixel Clicky

Plugins

Other

Icon Libraries

Fonts

Web Servers

SEO Analysis

D51/100

Meta Tags7/15

Content6/12

Headings5/8

Technical16/25

E-E-A-T0/7

Images4/7

Links4/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

calculators.orgcalculators.org

Calculators.org - Learn Math, Have Fun

No description available for this page.

Title Length38 chars

Recommended: 50-60 chars (~229px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description — important for click-through rates in SERPs

11 issues found

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Crawlability

Sitemap

robots.txt

9 rules

Local SEO

Local Search Readiness

9/100

Poor

2 14 2

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

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AI & LLM Readiness

F33/100

Bot Access

20/25

Machine Read.

5/25

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:1%

Words:159

Token eff.:Too Short

Sections/1K:18.9

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary15w

Descriptive Headingsavg 3.3w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

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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.

74/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

15/20

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

3/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

6/15

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.

37/100

173 mg

CO₂e / view

1.7 MB

Page Weight

60%

Cleaner Than

New Visitor

198 mg

Returning (cached)

99 mg

Annual (10K/mo)

20.8 kg

Emission Segments

Data Center

9 mg

Network

51 mg

Device

114 mg

Resource Breakdown

JavaScript

723.6 KB

Images

198.4 KB

CSS

760.4 KB

Fonts

2.8 KB

HTML

30.2 KB

Green Hosting Verified

pair Networks

Provider Match

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

No WAF

74d

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

19.04.2026

Valid Until

18.07.2026

Subject Alternative Names (2)

calculators.orgwww.calculators.org

SHA-256 Fingerprint

8D:D8:E3:B8:7C:3A:BA:C0:41:E5:B2:54:E0:EA:B2:D0:76:4C:5F:C2...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-type

text/html; charset=UTF-8

date

Tue, 05 May 2026 20:04:48 GMT

server

Apache

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

qs4869.pair.com

Domain Information

calculators.org

Domain Age

25 years

Created

05.05.2001

Expires

05.05.2027

Last Updated

27.10.2023

Registrar

NameCheap, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

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.

72/100

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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Raleway + Helvetica Neue

WCAG Partial

73/100

Readability

/30

24/30

16px · LH 1.60

Hierarchy

/20

14/20

2.19x ratio

WCAG

/25

14/25

2.61:1 min contrast

Performance

/25

21/25

System fonts

Heading Font

Raleway

Sans35px

Body Font

Helvetica Neue

Sans16px

Contrast Ratio

2.61:1

3 issues

Reading Comfort

~38 CPL

Narrow lines

35px

27px

23px

16px

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

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 46/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 2.6:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 2.2x larger than body text.

GGoogle FontsFlesch 46

Color Palette

7 unique colors

Light

#ffffff

Primary· 58.400000000000006%

#d9edee

Secondary· 15.899999999999999%

#d66b0a

Accent· 8.5%

#54b7cb

Accent· 6.5%

#eaf0c3

Accent· 5%

#d5d4ad

Secondary· 3.6%

#9b8a5a

Secondary· 1.9%

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Pinterest WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

calculators.org(9)connect.facebook.net(2)clickiocmp.com(2)s.clickiocdn.com(2)assets.pinterest.com(1)

Website Identity

calculators.org

25 years old

Location detected: 🇺🇸 United Statesvia ip

NameCheap, Inc.en-US

Social Profiles

Facebook X (Twitter)Pinterest

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Last analyzed: 05 May 2026 at 20:05

Historical Analysis & Change Tracking