Calculator.net Calculator.net: Free Online Calculators - Math, Fitness, Finance, Science
Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with related in-depth...
calculator.net Desktop Performance
99/100
These metrics represent real-world Chrome users experience viewing calculator.net web page. Reports are focused on loading performance and other critical factors that most affect user experience. Follow our guide to track, optimize, and improve the quality of your web pages.
User Loading Experience
First Input Delay
First Contentful Paint
Cumulative Layout Shift
Largest Contentful Paint
Metrics
Largest Contentful Paint98/100 0.8 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
First Contentful Paint98/100 0.7 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Cumulative Layout Shift98/100 0.057
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Speed Index100/100 0.7 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Time to Interactive100/100 0.7 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Total Blocking Time100/100 0 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Should Fix (6)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Eliminate render-blocking resources
Potential savings of 200 ms
204 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Uses efficient cache policy on static assets
10 resources found
Avoid large layout shifts
5 elements found
Largest Contentful Paint element
1 element found
Avoid chaining critical requests
2 chains found
Keep request counts low and transfer sizes small
13 requests • 66 KiB
Passed Audits (22)
Preload key requests
Serve images in next-gen formats
Enable text compression
Efficiently encode images
Initial server response time was short
Root document took 320 ms
Minify CSS
Avoids enormous network payloads
Total size was 66 KiB
All text remains visible during webfont loads
Avoids an excessive DOM size
246 elements
Remove unused JavaScript
JavaScript execution time
0.0 s
Use video formats for animated content
Minimizes main-thread work
0.2 s
Uses passive listeners to improve scrolling performance
Remove unused CSS
Avoid multiple page redirects
Potential savings of 190 ms
Defer offscreen images
Properly size images
Avoids `document.write()`
Preconnect to required origins
Minify JavaScript
Minimize third-party usage
Third-party code blocked the main thread for 0 ms
calculator.net Desktop SEO
82/100
These checks ensure that your page is optimized for search engine results ranking. There are additional factors Lighthouse does not check that may affect your search ranking. Learn more. Run these additional validators on your site to check additional SEO best practices.
Should Fix (2)
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Image elements do not have `[alt]` attributes
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. Learn more.
Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
Passed Audits (9)
Links are crawlable
Document has a meta description
Document has a `<title>` element
robots.txt is valid
Page has successful HTTP status code
Document has a valid `hreflang`
Document avoids plugins
Links have descriptive text
Page isn’t blocked from indexing
calculator.net Desktop Best Practices
85/100
These checks highlight opportunities to improve the overall code health of calculator.net page. Current recommendations will help to make your page fast and secure, to create a good user experience and to avoid deprecated technologies.
Should Fix (2)
Trust and Safety
Does not use HTTPS
1 insecure request found
Browser Compatibility
Page lacks the HTML doctype, thus triggering quirks-mode
Passed Audits (12)
Avoids front-end JavaScript libraries with known security vulnerabilities
Avoids Application Cache
No browser errors logged to the console
Properly defines charset
Serves images with appropriate resolution
Displays images with correct aspect ratio
Allows users to paste into password fields
Links to cross-origin destinations are safe
Avoids deprecated APIs
Avoids requesting the notification permission on page load
Avoids requesting the geolocation permission on page load
Detected JavaScript libraries
calculator.net Desktop Progressive Web App
41/100
These checks validate the aspects of a Progressive Web App. Learn more. These checks are required by the baseline PWA Checklist but are not automatically checked by Lighthouse. They do not affect your score but it's important that you verify them manually.
Should Fix (9)
Installable
Does not register a service worker that controls page and `start_url`
Does not use HTTPS
1 insecure request found
Web app manifest does not meet the installability requirements
Fast and reliable
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
PWA Optimized
Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
Manifest doesn't have a maskable icon
Is not configured for a custom splash screen
Does not set a theme color for the address bar.
Passed Audits (4)
Contains some content when JavaScript is not available
Provides a valid `apple-touch-icon`
Redirects HTTP traffic to HTTPS
Page load is fast enough on mobile networks
calculator.net Desktop Accessibility
60/100
These checks highlight opportunities to improve the accessibility of your web app. Only a subset of accessibility issues can be automatically detected so manual testing is also encouraged. These items address areas which an automated testing tool cannot cover. Learn more in our guide on conducting an accessibility review.
Should Fix (5)
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
`<html>` element does not have a `[lang]` attribute
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Links do not have a discernible name
Form elements do not have associated labels
Image elements do not have `[alt]` attributes
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (10)
Heading elements appear in a sequentially-descending order
`[id]` attributes on active, focusable elements are unique
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Document has a `<title>` element
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
The page contains a heading, skip link, or landmark region
ARIA IDs are unique
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
`[aria-hidden="true"]` is not present on the document `<body>`
Desktop Speed
89/100
These checks analyze the performance of calculator.net on desktop devices and return PageSpeed score and information on how to improve the load time. What makes a good Progressive Web App?
Should Fix (2)
Leverage browser caching
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Passed Audits (8)
Avoid landing page redirects
Enable compression
Reduce server response time
Minify CSS
Minify HTML
Minify JavaScript
Optimize images
Prioritize visible content
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