webNRG⚡️
... pronounced web energy ;)

Tested on


Rendering Energy

The CPU power consumption for rendering was

With an initial load and then waiting for 5s the total visit time was:

This equates to an energy of:

Over a year with 10,000 monthly page views this would consume


Network Data

The network data transfer the website was for loading and staying on the page for

Over a year with 10,000 monthly page views this website would produce about


What about scrolling?

A page can download way more resources when scrolling down. Also some energy intensive rendering elements can be below the fold.

However scrolling is hard to compare as some pages have infinite scrolling and some don't.

Scrolling down took an additional:

While scrolling the additional downloaded amount of data was:

The rendering power while scrolling was:


History and more details


How does it work? 👉 Read about the methodology here