We all know how to cast and mirror contents from your smartphone or PC to Chromecast connected TVs. But one of the hidden features in the casting device is that you can use Chromecast as a Second Monitor. This can help you in a lot of ways. You can watch movies on your PC and use your Chromecast connected TV to browse the internet. You can also make two PC screens with ease. Follow the below steps to use your Chromecast as a second Monitor.


  • Google Chromecast
  • TV with HDMI port
  • PC running on Windows 8
  • 2015 version of Chrome browser
  • WiFi connection

This method works only on the Windows 8 PCs and not in the updated versions like Windows 8.1 or Windows 10. Also, you need to have the older version of the Chrome browser. In the older versions, you need to install the Google Cast extension from the Chrome Web Store. In the recent versions, the Google Cast option is fully built into the browser.

Related: How to Chromecast Browsers to TV

Steps to use Chromecast as a Second Screen

Step 1: On your PC, open the Settings menu.

Step 2: Click on the PC and Devices option.

PC Settings

Step 3: On the next screen, click the Display option.

Chromecast as second monitor

Step 4: On the Display Windows, click the Detect button on the right side of the screen.

Chromecast as second monitor

Step 5: It will show you the alert that no other display is detected. In addition to that, it will add an undetected display next to the default one.

Chromecast as second monitor

Step 6: Now, click on the second display to select it and scroll down to the Multiple displays option.

Step 7: Click the Multiple displays drop-down and choose the option Try to connect anyway on: VGA.

Chromecast as second monitor

Step 8: Click Apply to save these changes on your PC laptop or desktop.

Step 9: Now, you have created two displays on your PC. Click the Multiple displays option again and choose Extend these displays option.

Extend these displays

Step 10: If you want, you can change the position of your second screen. Click Apply to save the changes.

Step 11: Now, open the Chrome browser and click the Google Cast extension.

Step 12: Click the drop-down menu and choose the Cast screen/window (experimental) option.

Cast screen/window (experiemental)

Step 13: A pop-up will appear asking you to choose the screen. Select the newly created second screen and click Share.

Chromecast as second monitor

Step 14: The chosen screen will be displayed on your TV. Now, you can work on two screens.

Related: How to Chromecast Mac to TV

Final Words

Using Chromecast as a second screen is one of the most productive ways of doing your work. Unfortunately, this feature is available only on the older version. If you know any other way to use Chromecast as second monitor, then comment below.