CalculatorWorld

CalculatorWorld offers 500+ free online calculators for finance, health, BMI, EMI, GST, tax, salary, business profit, age, percentage, investment, education, and daily life calculations.

www.calculatorworld.online · Added June 6, 2026 · Last analysed June 6, 2026 · via

Own this Launch?

StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 6 June 2026; the live site may have changed since.

CalculatorWorld ships with the basics, with a thorough launch checklist and clean crawl signals. Main gaps: missing several security headers, incomplete legal pages, and no email security records.

Launched on Product Hunt on June 6, 2026. The site is hosted on Amazon.com in the United States. We've detected 6 technologies on this site, covering build tooling, CSS frameworks, web fonts, and hosting. The stack includes Tailwind CSS, Vite, and Google Fonts.

It's on one of the most common stacks we track, shared by 1,387 launches.

If you own this site, refresh the snapshot and see the full fix list any time →

5.5

StackScope Score

Fair

100/100 Launch Readiness

Launch ready

1/6 Security Headers

Poor

0/3 Legal

Missing

2/2 Web Standards

Complete

90/100 Performance

Fast

Vibe Score 8 · Few AI signals

Informational pattern-match signal. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (6)

Infrastructure

Hosting	Vercel
Security	HSTS

Build & Framework

Build tool	Vite
CSS framework	Tailwind CSS
Font	Google Fonts

Analytics & Marketing

SEO	Google Search Console

Infrastructure

Network

AMAZON-02 - Amazon.com, Inc., US

AS16509 · US

DNSSEC

Not enabled

DNS responses unsigned. Cache-poisoning vulnerable.

SSL Certificate

Let's Encrypt

Valid 31 May 2026 to 29 Aug 2026

Certificate as captured in this snapshot, not a live check.

Email Security

✗

SPF Not published. Your domain can be spoofed in phishing emails.

DKIM Not detected at common selectors. Your provider may use a custom one.

✗

DMARC Not published. Receivers fall back to permissive defaults.

MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.

TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (1)

Local storage (1)

Key	Size	Detected as
theme	5 B	-

Readiness Breakdown How?

✓ Custom title and meta description

✓ Open Graph tags (title, image, description)

✓ Twitter card meta tags

✓ Canonical URL declared

✓ Responsive viewport meta tag

✓ Favicon present

✓ Semantic HTML (nav, main, article)

⚠

Page title is 87 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.

⚠

Meta description is 186 characters (advisory) Google only shows about 155–160 characters of the description in desktop search results (less on mobile); anything past that won't appear.

Performance How?

461 ms Server response

40% Faster than peers

656 ms Largest contentful paint

0.01 Cumulative layout shift

984 KB Page weight

3 Third-party domains

0 Console errors

0 Failed requests

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

Vibe Score Breakdown How?

Signal	Points
AI palette signals	+5
AI writing signals	+3

This score is based on structural patterns and is not definitive. Many legitimate sites may trigger signals, and AI-built sites may go undetected. It should be treated as an indicator, not a verdict.

AI Stance

No AI stance declared

✗ llms.txt published

✓ No AI bots blocked in robots.txt

Content-Signal

? No directive declared

Link headers

? None advertised

Well-Known Files

✓ robots.txt

✓ sitemap.xml (95 URLs)

✗ security.txt

✗ llms.txt

✗ ads.txt

✗ humans.txt

Legal

? Privacy Policy not detected

? Terms of Service not detected

Detection works best on English language sites.

Security Headers (1/6)

✗

Referrer-Policy

✗

X-Frame-Options

✗

Permissions-Policy experimental (check browser support)

✗

X-Content-Type-Options

✗

Content-Security-Policy

✓

Strict-Transport-Security

–

X-XSS-Protection deprecated (use Content-Security-Policy)

Build

✓ HTML minified

✗ CSS minified

✗ JS minified

2 JS files

2 CSS files

3 Third-party domains

App Manifest

CalculatorWorld

display: standalone 2 icons

theme #4f46e5

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.