Percentage Calculator
Free percentage calculator. Find a percent of a number, what percent one number is of another, percentage change, and increase or decrease by a percent.
Added 11 Nov 2026
Analysed 11 Nov 2026
via 
What we found
- Analytics set tracking cookies before any opt-in, and we found no consent manager.
- There are no SPF or DMARC records, so anyone can send email that claims to come from this domain.
- It sends one of the six security headers we check; Content-Security-Policy is among those missing.
- Built with ASP.NET, the site is hosted on Plesk, with a domain registered 5 weeks before launch.
- One more gap is listed further down the page.
Built with: 10 technologies
Embed this on your site
For light pages
<a href="https://firstsited.com/launch/9ozsq0ov/percentage-calculator"><img src="https://firstsited.com/badge/9ozsq0ov/stack.svg" alt="Percentage Calculator tech stack on FirstSited" height="28"></a>
For dark pages
<a href="https://firstsited.com/launch/9ozsq0ov/percentage-calculator"><img src="https://firstsited.com/badge/9ozsq0ov/stack.svg?theme=dark" alt="Percentage Calculator tech stack on FirstSited" height="28"></a>
| Technology | Type |
|---|---|
| Infrastructure | |
Cloudflare DNS
|
DNS |
Plesk
|
Hosting |
| HSTS | Security |
Microsoft IIS
|
Server |
| Build & Framework | |
ASP.NET
|
Backend framework |
Font Awesome
|
Icon font |
cdnjs
|
Package CDN |
| Analytics & Marketing | |
Google Analytics
(4)
|
Analytics |
Google Search Console
|
SEO |
Google Tag Manager
(2)
|
Tag management |
Each technology links to its own page: which other new sites launched with it.
Site checks
| 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 75 characters Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible. |
| Referrer-Policy | |
| X-Frame-Options | |
| Permissions-Policy experimental | |
| X-Content-Type-Options | |
| Content-Security-Policy | |
| Strict-Transport-Security | |
| X-XSS-Protection deprecated, not counted |
| Privacy policy /privacy-policy | |
| Terms of service /terms-of-service | |
| Consent manager not detected; analytics set tracking cookies on our visit with no opt-in step |
Mentions: Cookies
| robots.txt | |
| sitemap.xml 138 URLs | |
| security.txt optional | |
| llms.txt optional | |
| ads.txt only for ad-funded sites | |
| humans.txt optional |
| llms.txt published not published | |
| No AI bots blocked in robots.txt | |
| Content-Signal none declared | |
| Link headers none advertised |
| State | Record | Status |
|---|---|---|
| SPF | Not published | |
| DMARC | Not published | |
| DKIM | Not found at common selectors | |
| MTA-STS | Not deployed | |
| TLS-RPT | Not configured |
Without SPF and DMARC, anyone can send email that claims to come from this domain. Those two are the records to add first.
Hosting and network
| Network | IS-AS-1 - Interserver, Inc, US AS19318, US |
|---|---|
| DNS | Cloudflare DNS authoritative nameservers |
| DNSSEC | Not enabled DNS answers are unsigned |
| Certificate | Let's Encrypt valid 8 Oct 2026 to 6 Jan 2027, as captured |
| Domain age | 1 month registered Oct 2026, Cloudflare, Inc. |
| Green hosting | No record per The Green Web Foundation |
| Page build | 4 JS files, 2 CSS files 3 third-party domains, code splitting |
| App manifest | Published display standalone; 2 icons |
| Brand colours |
Storage: 2 items
| Name | Lifetime | Set by |
|---|---|---|
| _ga | 1y | Google Analytics |
| _ga_L3BHL4YHT3 | 1y | Google Analytics |
Performance
| Measure | This site | Reading |
|---|---|---|
| Server response | 357 ms | good, faster than 39% of sites |
| Largest contentful paint | 1,032 ms | good |
| Layout shift | 0.00 | good |
| Page weight | 384 KB | light |
| Third-party domains | 3 | |
| Console errors | 0 | none |
| Failed requests | 0 | none |
From a single automated render of the home page. A quick guide, not a substitute for Lighthouse or field data. How we measure
Notes
-
Looks AI-built: few AI signals.
How much the site looks AI-generated. It is a pattern match shown for interest, not a verdict.
Which signals fired
Signal Points AI code-structure signals +5 - Analytics set tracking cookies on our visit and no consent manager was detected. UK and EU GDPR require opt-in before tracking runs, and more than 20 US states require honouring opt-out requests.
- Performance comes from one render on 11 November 2026 and will vary between visits.
How we know
FirstSited records what new websites are built with, usually within a day of going live. Most we find ourselves, by watching public internet infrastructure for brand-new sites; the rest come from Product Hunt, Hacker News and PeerPush. We checked this one in full: its tech stack, DNS, security headers and page basics. This page is what we saw on 11 November 2026; the live site may have changed since.
Every technology below links to its own page: which other new sites launched with it. Watch any of them and get every new site that uses it as it goes live, from £15 a month.