First visit
CO2 0.844g
SIZE 2.25 MB
Return visit
CO2 0.216g
SIZE 588.59 KB
Emissions calculator
40%
60%
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
Type
Requests
Size
CO2
Document
1
11.08 KB
0.004g
Script
14
1.22 MB
0.460g
Font
2
110.78 KB
0.041g
Stylesheet
2
169.79 KB
0.062g
Image
12
608.46 KB
0.223g
XHR
2
3.01 KB
0.001g
Other
2
41.44 KB
0.015g
Fetch
12
100.84 KB
0.037g
History
Date
CO2
Size
22.Jul.2026
0.844g
2.25 MB
22.Jul.2026
0.843g
2.24 MB
05.Mar.2026
0.630g
1.68 MB
03.Apr.2025
1.976g
5.26 MB
28.Feb.2024
0.820g
2.18 MB
19.May.2022
1.290g
1.54 MB
This website has been tested 6 times**
Core Web Vitals
Max Potential First Input Delay
140 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task.
Learn more about the Maximum Potential First Input Delay metric
Cumulative Layout Shift
0.002
Cumulative Layout Shift measures the movement of visible elements within the viewport.
Largest Contentful Paint
0.9 s
Largest Contentful Paint marks the time at which the largest text or image is painted.
Opportunities
Total Blocking Time
250 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
Minimizes main-thread work
1.3 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 0 ms
Keep the server response time for the main document short because all other requests depend on it.
Server Backend Latencies
10 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance.
Reduce unused JavaScript
Est savings of 528 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity.
JavaScript execution time
0.9 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this.
Reduce unused CSS
Est savings of 179 KiB
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity.
Time to Interactive
2.7 s
Time to Interactive is the amount of time it takes for the page to become fully interactive.
Speed Index
1.1 s
Speed Index shows how quickly the contents of a page are visibly populated.
Network Round Trip Times
0 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance.
First Contentful Paint
0.6 s
First Contentful Paint marks the time at which the first text or image is painted.
Avoids enormous network payloads
Total size was 2,299 KiB
Large network payloads cost users real money and are highly correlated with long load times.
Switch to green hosting
One of the easiest things to do that instantly reduces your impact.
Notes
* These are assets not hosted on the same domain e.g. tracking scripts, iframe embeds, or files hosted on a CDN.
** This was only counted from 11.Apr.2021.
These measurements are for each new visitor, for returning visitors the footprint would be lower based on caching mechanisms.
Our brackets for the ratings: