calculatestuff.com

https://calculatestuff.com· First analyzed 12 May 2026· Updated 12 May 2026

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calculatestuff.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

172.66.40.212

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

daisy.ns.cloudflare.com.gannon.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

560 ms10%

Speed Index

728 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

8 KB

26 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

5 Technologies Detected

Analytics

Other

CSS Frameworks

CDN

SEO Analysis

C67/100

Meta Tags12/15

Content11/12

Headings3/8

Technical22/25

E-E-A-T0/7

Images4/7

Links3/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

calculatestuff.comcalculatestuff.com

Online Calculators - CalculateStuff.com

CalculateStuff.com, the place where stuff gets calculated! We offer a wide and ever growing range of advanced online calculators.

Title Length39 chars

Recommended: 50-60 chars (~232px / 580px)

Description Length129 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

8 issues found

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Crawlability

Sitemap

Type: standard

171 URLs

robots.txt

2 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

9/100

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

F36/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

1/25

Citation

7/25

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:9%

Words:515

Token eff.:Optimal

Sections/1K:3.9

Depth:1/5

Structured Data

1 JSON-LD

BreadcrumbList

Citation Readiness

Opening Summary

Descriptive Headingsavg 2w

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...

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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.

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

9/20

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

6/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 recommendations

•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.

71/100

A+

<0.001 g

CO₂e / view

8.0 KB

Page Weight

95%

Cleaner Than

New Visitor

<0.001 g

Returning (cached)

<0.001 g

Annual (10K/mo)

96 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

<0.001 g

Resource Breakdown

HTML

8.0 KB

Green Hosting Verified

Cloudflare

GWF Verified

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

85%Very Good

Critical / Transactional

HTTPS

WAF

63d

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

Valid From

15.04.2026

Valid Until

14.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

calculatestuff.com*.calculatestuff.com

SHA-256 Fingerprint

89:49:4D:81:17:70:71:28:04:CB:96:6B:4F:E4:78:CA:5D:88:4B:FB...

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HTTP Headers

Developer Console

cf-cache-status

DYNAMIC

cf-ray🇫🇷 Paris

9fa8b03fbab4d145-CDG

content-encoding

📦 Gzip(gzip)

content-security-policy

default-src 'self'; base-uri 'none'; object-src 'none'; scri...

content-type

text/html; charset=utf-8

date

Tue, 12 May 2026 10:20:02 GMT

Good Warning Issue

Email Infrastructure

Zoho Mail

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (3)

mx2.zoho.com

mx.zoho.com

mx3.zoho.com

Domain Information

calculatestuff.com

Domain Age

15y 2m

Created

20.02.2011

Expires

20.02.2030

Last Updated

28.01.2025

Registrar

NameCheap, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner

Quantcast Choice

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.

68/100

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=1.0

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Helvetica Neue

WCAG AA

69/100

Readability

/30

20/30

14px · LH 1.43

Hierarchy

/20

7/20

WCAG

/25

22/25

5.75:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

Helvetica Neue

Sans

Body Font

Helvetica Neue

Sans14px

Contrast Ratio

5.75:1

WCAG AA (≥4.5:1)

Reading Comfort

Single Font Family

left aligned

30px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

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

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.8:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ System fonts: Zero font loading delay — best possible LCP impact.

Flesch 0

Color Palette

3 unique colors

3.28:1 AA Large Light

#ffffff

Primary· 96.99999999999999%

#8d8e91

Other· 1.8%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

18 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.calculatestuff.com(12)googletagmanager.com(2)cmp.inmobi.com(2)google-analytics.com(1)

Website Identity

calculatestuff.com

15 years old

Location detected: 🇨🇦 Canadavia ip

NameCheap, Inc.📧 Zoho Mailen

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Last analyzed: 12 May 2026 at 10:20

Historical Analysis & Change Tracking