www.calculator.net speed test — 20 Oct 2026
Measured from the wfix.shop server on 20 October 2026 at 12:44 UTC. Grade A (96/100), with the screenshots, the timings and the fixes that matter.
Where the first byte went
- DNS lookup 49 ms 14%
- TCP connect 84 ms 24%
- Server wait 220 ms 62%
Measured on the connection that fetched the HTML. Every other request on the page waits for the end of this bar before it can start.
How this page compares
Every report published here is in this comparison, so it is a reference population of pages tested from one server - not a benchmark of the whole web.
What these numbers mean
- The first byte arrived in 353 ms. That is workable, and the cheapest win left is caching or a warmer connection.
- The page transfers 41.0 KB over 15 request(s), which is lean. Images files are 57% of it, so resize and recompress the largest images before anything else.
- The HTML itself arrives gzip-compressed.
- It runs over HTTP/3, so the assets share a connection instead of opening one each.
- 82% of the weight comes from other hosts (analytics, fonts, embeds), which also means their slow day becomes your slow day.
- The largest element painted at 400 ms, inside the 2.5 s Google calls good.
Fix first: Avoid extra redirects - Link to the canonical URL (and make sure http, the apex domain and www all point at it) so no visitor pays a redirect first.
Read on one shared server, not a visitor's phone: use it to compare pages against each other, not as a promise about every connection. We fix what these tests find.
Screenshot
What the page looks like
Loaded in headless Chromium on this server. Click an image to open it full size.
Browser render
The same URL loaded in a real browser, so these are the readings curl cannot produce. The grade above is still built from the server measurements.
Page weight by type
What the page is made of
Transfer size, compressed as sent. 15 request(s) in total, 41.0 KB across all of them.
Top issues
Avoid extra redirects
medium impact1 redirect hop(s) before the page load started, each one a full round trip before the first byte.
Fix: Link to the canonical URL (and make sure http, the apex domain and www all point at it) so no visitor pays a redirect first.
Strict-Transport-Security
low impactHSTS is not set, so the first visit on a hostile network can still be downgraded to HTTP.
Fix: Send Strict-Transport-Security with a max-age of at least six months. Add includeSubDomains once every subdomain is HTTPS.
Waterfall
Slowest requests
Each bar is one request's own response time, scaled to the slowest. Assets were fetched in parallel, so the bars overlap in real time rather than stacking. first party third party
| Request | Type | Status | Time | Size |
|---|---|---|---|---|
| https://d26tpo4cm8sb6k.cloudfront.net/img/math-calculator.jpg 3rd party | images | 200 | 903 ms | 5.8 KB |
| https://d26tpo4cm8sb6k.cloudfront.net/img/other-calculator.jpg 3rd party | images | 200 | 871 ms | 5.3 KB |
| https://d26tpo4cm8sb6k.cloudfront.net/img/financial-calculator.jpg 3rd party | images | 200 | 871 ms | 5.0 KB |
| https://d26tpo4cm8sb6k.cloudfront.net/apple-touch-icon.png 3rd party | images | 200 | 862 ms | 313 B |
| https://www.calculator.net/manifest.json | other | 200 | 795 ms | 181 B |
| https://www.calculator.net/style.css | css | 200 | 788 ms | 3.4 KB |
| https://d26tpo4cm8sb6k.cloudfront.net/js/common.js 3rd party | javascript | 200 | 785 ms | 5.5 KB |
| https://www.calculator.net/css/sci.css | css | 200 | 730 ms | 747 B |
| https://d26tpo4cm8sb6k.cloudfront.net/img/svg/calculator-white.svg 3rd party | images | 200 | 712 ms | 1.5 KB |
| https://d26tpo4cm8sb6k.cloudfront.net/img/svg/all-calculators.svg 3rd party | images | 200 | 705 ms | 362 B |
| https://d26tpo4cm8sb6k.cloudfront.net/img/fitness-calculator.jpg 3rd party | images | 200 | 680 ms | 4.9 KB |
| https://d26tpo4cm8sb6k.cloudfront.net/js/scientific3.js 3rd party | javascript | 200 | 679 ms | 4.8 KB |
| https://d26tpo4cm8sb6k.cloudfront.net/icon-32x32.png 3rd party | images | 200 | 679 ms | 177 B |
| https://d26tpo4cm8sb6k.cloudfront.net/icon-16x16.png 3rd party | images | 200 | 679 ms | 173 B |
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