Calculus Call is a handy Chrome extension developed by Mauro Lopes. As a free add-on tool in the Browsers category, it provides users with the ability to perform various calculations without leaving their current web page.

With Calculus Call, you can easily obtain average values, whether with or without weight. Whether you need to calculate the average score of your assignments or the average rating of a product, this extension has got you covered.

Additionally, the extension allows you to perform rule of three calculations. Whether you want to determine the value of a missing variable in a proportion or solve a direct or inverse variation, Calculus Call provides a quick and efficient solution.

Furthermore, Calculus Call offers different types of percentage calculations. Whether you need to calculate a percentage increase, decrease, or determine the percentage of a value in relation to another, this extension simplifies the process.

The best part is that all these features are easily accessible within your browser tab, eliminating the need to switch between different applications or web pages. Calculus Call provides a convenient solution for quick calculations while browsing the web.