The fastest way to show PowerPoint on your TV

You can send a PowerPoint presentation to your TV through Chromecast in two ways: cast your entire screen, or cast just the PowerPoint window. Screen casting works on Windows, Mac, and Chromebook. Window casting (which hides your notes and speaker view from the TV) works on Windows 10 and later, and on Mac with some limitations.

The simplest route for most people is full-screen casting. Your Chromecast device must be plugged into your TV and connected to the same Wi-Fi network as your computer. Once that's set up, you open PowerPoint, start your presentation, and cast from your browser or the desktop app.

Key Takeaways

  • Full-screen casting works on any device and hides your speaker notes from the audience, but shows your entire desktop if you switch windows.
  • Window casting (Windows 10 and later, Mac) sends only the PowerPoint window to the TV, so you can safely check notes without the audience seeing them.
  • Your computer and Chromecast must be on the same Wi-Fi network; you do not need to sign into a Google account.
  • Casting starts from the Chrome browser menu or from the desktop PowerPoint app—the web version (PowerPoint.com) does not support casting directly.
  • Audio plays through your TV speakers by default, but you can route it to your computer speakers instead if you need to speak without the audience hearing.

Full-screen casting: the simplest method

Full-screen casting sends everything on your monitor to the TV. Open PowerPoint and start your presentation in slideshow mode. Then open the Chrome browser menu (three vertical dots in the top right), select Cast, choose your Chromecast device, and pick Cast screen. Your presentation appears on the TV within a few seconds.

The advantage is that this works on Windows, Mac, and Chromebook without any special setup. The disadvantage is that if you click away from PowerPoint to check an email or look at notes on another window, the audience sees that too. Your speaker notes stay hidden—they only appear on your computer screen—but your desktop does not.

To stop casting, click the Cast icon again and select Stop casting. The presentation ends on the TV when ready.

Window casting: keeping your notes private

Window casting sends only the PowerPoint window to the TV. This means you can safely click to other windows on your computer without the audience seeing them. You can check notes, read an email, or pull up a reference document while the TV shows only your slides.

On Windows 10 and later, open PowerPoint and start your presentation. Open the Chrome menu, select Cast, choose your Chromecast device, and pick Cast window instead of Cast screen. Select the PowerPoint window from the list. Only that window appears on the TV.

On Mac, window casting is less reliable. The feature exists in newer versions of Chrome, but some users report that it drops the connection or fails to start. If you are on Mac and window casting does not work, full-screen casting is your backup option.

Setting up your Chromecast and Wi-Fi

Your Chromecast device must be plugged into an HDMI port on your TV and powered on. It should be connected to the same Wi-Fi network as your computer. You do not need to sign into a Google account on the Chromecast itself—the device connects to your network during initial setup, and that is enough.

To check that your computer and Chromecast are on the same network, look at your Wi-Fi settings. Both should show the same network name (SSID). If your computer is on a guest network and your Chromecast is on the main network, casting will not work. Switch your computer to the same network as the Chromecast.

If you have never set up your Chromecast, follow the instructions that came with it or visit Google's setup page. The process takes about five minutes and requires the Google Home app on your phone or tablet.

Using PowerPoint on the web versus the desktop app

If you use PowerPoint through Office 365 online (PowerPoint.com), you cannot cast directly from the browser. Instead, open Chrome, go to PowerPoint.com, and cast your entire screen. The web version does not have a built-in cast button the way the desktop app does.

The desktop PowerPoint app (installed from Microsoft Office or Microsoft 365) has a Present menu that includes a Cast your screen option. This is faster than opening Chrome separately, but it still requires Chrome to be installed on your computer in the background.

If you are using an older version of PowerPoint (2016 or earlier), the Cast option may not appear in the menu. Update to the latest version, or use the Chrome casting method instead.

Troubleshooting connection problems

If the Cast option does not appear in your Chrome menu, make sure Chrome is fully updated. Open Chrome, click the three-dot menu, go to Help, and select About Google Chrome. Chrome will check for updates and install them automatically.

If your Chromecast does not appear in the Cast list, restart both your computer and your Chromecast device. Unplug the Chromecast for 10 seconds, plug it back in, and wait for it to boot up. Then try casting again. If the Chromecast still does not appear, check that both devices are on the same Wi-Fi network by looking at your network settings.

If the connection drops during your presentation, move your computer closer to the Chromecast or your Wi-Fi router. Thick walls or distance can weaken the signal. If the problem persists, restart your Wi-Fi router and try again.

Audio routing and speaker options

By default, audio from your presentation plays through your TV speakers. If you want to speak without the audience hearing the audio, you can route sound to your computer speakers instead. Open your computer's sound settings, find the output device, and switch it from your TV (or HDMI output) to your computer speakers or headphones before you start casting.

If you are using a laptop microphone to speak and you want the audience to hear you through the TV speakers, keep the audio routed to the TV. The TV will play both your voice (if you are speaking into a microphone connected to your computer) and any audio from your slides.

Frequently Asked Questions

Can I cast PowerPoint from my phone or tablet?

Yes, but only if you have the PowerPoint app installed. On Android, open PowerPoint, start your presentation, tap the three-dot menu, and select Cast. On iPad, the process is similar. The web version of PowerPoint does not support casting from mobile devices.

What if my Chromecast is on a different Wi-Fi network than my computer?

Casting will not work. Both devices must be on the same network. If your Chromecast is on your main network and your computer is on a guest network, switch your computer to the main network in your Wi-Fi settings and try again.

Does the presenter view show on the TV when I cast?

No. When you cast, the audience sees only the slides. Your speaker notes, timer, and next-slide preview stay on your computer screen. This is true for both full-screen and window casting.

Can I use a wired connection instead of Wi-Fi?

No. Chromecast requires Wi-Fi. If your computer does not have Wi-Fi, you will need to add a Wi-Fi adapter or use a different casting method, such as an HDMI cable or a different streaming device.

What happens if I close PowerPoint while casting?

The presentation stops on the TV when ready. The Chromecast stays connected to your computer, but the screen goes blank. You can start a new presentation and cast it again without restarting anything.