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calcus.ru

https://calcus.ru· First analyzed 22 May 2026· Updated 22 May 2026
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calcus.ru
Desktop screenshot of calcus.ru
Mobile screenshot of calcus.ru
Mobile

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Hosting Provider

IHC

IP Address

130.49.173.84

Site Location

🇷🇺 Russiavia tld

Server Location

🇷🇺 Moscow, Russia

ASN

AS210079

Server

Nginx

Nameservers

ns1.ihc.ru.ns2.ihc.ru.

Performance

87

Core Web Vitals

Weight

First Contentful Paint
1.7 s10%
Speed Index
2.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
253 KB
12 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
IHC

Technology Stack

2 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Nginxv1.26.3

SEO Analysis

C64/100
16
7
1
Meta Tags12/15
Content11/12
Headings7/8
Technical18/25
E-E-A-T0/7
Images1/7
Links3/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
C
calcus.rucalcus.ru

Онлайн калькуляторы — calcus.ru

На нашем сайте вы найдете десятки онлайн калькулятор на различные тематики: кредиты, финансы, налоги, инвестиции, недвижимость, авто.

Title Length31 chars

Recommended: 50-60 chars (~187px / 580px)

Description Length133 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (2/2) — critical for accessibility and SEO

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

191 URLs

robots.txt

50 rules

Sitemap reference found

Local SEO

Local Search Readiness

3/100
Poor
1 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

F39/100
Bot Access
20/25
Machine Read.
9/25
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
header/footer
Text ratio:4%
Words:541
Token eff.:Optimal
Sections/1K:3.7
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary59w
Descriptive Headingsavg 1.5w
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.
D
58/100
9
Passed
4
Critical
2
Warnings
Images & Alt Text
10/20
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
3/15
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.
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.
56/100
A+
31 mg
CO₂e / view
253.1 KB
Page Weight
95%
Cleaner Than
New Visitor
36 mg
vs
Returning (cached)
18 mg
Annual (10K/mo)
3.8 kg
Emission Segments
Data Center
7 mg
Network
8 mg
Device
17 mg
Resource Breakdown
JavaScript
163.6 KB
Images
13.5 KB
CSS
46.6 KB
HTML
29.5 KB
Green Hosting Not Verified
IHC
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

0%Critical
Critical / Transactional

HTTPS

No WAF

122d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

21.08.2025

Valid Until

22.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.calcus.rucalcus.ru

SHA-256 Fingerprint

5F:4D:EC:81:45:08:BB:C0:81:E5:F3:1D:F1:1A:A8:11:8D:FA:FA:AC...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control
🔴 No Cache(no-store, no-cache, must-revalidate)
connection
keep-alive
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=UTF-8
date
Fri, 22 May 2026 21:12:47 GMT
expires
Thu, 19 Nov 1981 08:52:00 GMT
Good Warning Issue

Email Infrastructure

Yandex Mail

Score

45

SPF
DKIM
DMARC

MX Records (1)

mx.yandex.net

Domain Information

calcus.ru

Domain Age
11y 6m

Created

12.11.2014

Expires

12.11.2026

Registrar

REGTIME-RU

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
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.
C
60/100
Mobile Friendly1 breakpoint
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,maximum-scale=1,user-scalable=no
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

-apple-system

WCAG AA
71/100
Readability
/30
14/30

13px · LH 1.75

Hierarchy
/20
17/20

2.72x ratio · ✓ H1→H6

WCAG
/25
18/25

6.29:1 min contrast

Performance
/25
22/25

System fonts

Heading Font

-apple-system

Sans35px

Body Font

-apple-system

Sans13px

Contrast Ratio

6.29:1

WCAG AA (≥4.5:1)

Reading Comfort

~35 CPL

Narrow lines
35px
h1
17px
h2
13px
p

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 6.3:1).

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

✅ Strong hierarchy: Headlines are 2.7x larger than body text.

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

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

Color Palette

4 unique colors
Light
#ffffff
Background· 92.09999999999997%
#8d8da1
Primary· 2.8%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

5 Resources

3
Scripts
2
Styles
1
Async
0
Defer

Top Script Sources

local(2)mc.yandex.ru(1)

Website Identity

calcus.ru

11 years old
Location detected: 🇷🇺 Russiavia tld
REGTIME-RU📧 Yandex Mailru

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Last analyzed: 22 May 2026 at 21:13

Historical Analysis & Change Tracking