CrXPRT 2

CrXPRT 2 is a tool that tells you how fast a Chromebook handles things you do every day, like playing video games, watching movies, editing pictures, and doing homework. It even measures battery life. The performance test, which measures the speed of your Chromebook, gives you an overall score and individual scores for each of the six workloads. The battery life test produces an estimated battery life expressed in hours and minutes, a separate performance score, and a frames per second (FPS) rate for a built-in HTML5 gaming component. CrXPRT is easy to use and delivers results you can understand.

Screenshots from Chrome Web Store