First visit

CO2 0.008g

SIZE 10.86 KB

Return visit

CO2 0.003g

SIZE 4.08 KB

Overall this web page has been graded A+ when it comes to its carbon footprint

This website is hosted using renewable energy or carbon offsets.

Find out more about grades

Emissions calculator



Total: per month

This is equivalent to: Driving miles in a Tesla Model S Watching hours of Netflix (in HD)

At least trees would be needed to offset the CO2 in a year

Page breakdown







5.98 KB




3.34 KB




1.53 KB


Core Web Vitals

Max Potential First Input Delay

20 ms

The maximum potential First Input Delay that your users could experience is the duration of the longest task.

Largest Contentful Paint

0.3 s

Largest Contentful Paint marks the time at which the largest text or image is painted.


Uses efficient cache policy on static assets

5 resources found

A long cache lifetime can speed up repeat visits to your page.

Speed Index

0.3 s

Speed Index shows how quickly the contents of a page are visibly populated.

Avoids an excessive DOM size

92 elements

A large DOM will increase memory usage, cause longer style calculations, and produce costly layout reflows

Avoids enormous network payloads

Total size was 11 KiB

Large network payloads cost users real money and are highly correlated with long load times.

First Contentful Paint

0.3 s

First Contentful Paint marks the time at which the first text or image is painted.

Minimizes main-thread work

0.1 s

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this.

Initial server response time was short

Root document took 140 ms

Keep the server response time for the main document short because all other requests depend on it.

First Meaningful Paint

0.3 s

First Meaningful Paint measures when the primary content of a page is visible.

Time to Interactive

0.3 s

Time to interactive is the amount of time it takes for the page to become fully interactive.


* These are assets not hosted on the same domain e.g. tracking scripts, iframe embeds, or files hosted on a CDN.

These measurements are for each new visitor, for returning visitors the footprint would be lower based on caching mechanisms.

Our brackets for the ratings:

  • A+: less than 0.095g

  • A: less than 0.185g

  • B: less than 0.34g

  • C: less than 0.49g

  • D: less than 0.65g

  • E: less than 0.85g

  • F: above 0.85