How to Connect Your Laptop to a TV Wirelessly

The three ways to send video from your laptop to a TV without cables

You can connect a laptop to a TV wirelessly using one of three methods: casting (sending video from your laptop to a TV that has a receiver built in), screen mirroring (duplicating your entire screen on the TV), or streaming to a separate device (using a small box plugged into the TV). Which one works depends on what hardware you own and what you want to do — watch movies, give a presentation, or play games.

The easiest route is usually casting if your TV supports it. Most newer TVs made after 2015 have built-in casting receivers. If your TV is older or doesn't have the feature, you can add one with a device like a Roku, Amazon Fire Stick, Apple TV, or Google Chromecast for $25 to $100. Screen mirroring works on almost any TV if you have the right adapter, but it uses more battery and can be slower.

Key Takeaways

Casting sends video directly from your laptop to a TV that has a built-in receiver or a separate device like Chromecast or Roku plugged into it.
Screen mirroring duplicates everything on your laptop screen to the TV and works on older TVs, but drains your battery faster and may have slight lag.
Your laptop and TV must be on the same Wi-Fi network for any wireless method to work.
Windows laptops use Miracast or the built-in Cast feature; Mac laptops use AirPlay, which requires an Apple TV or AirPlay-compatible TV.
Casting usually works better for watching video or presentations, while screen mirroring is better if you need to use your laptop normally while the TV shows the same thing.

Casting from Windows to a TV with a built-in receiver or streaming device

If your TV has a built-in Chromecast, Roku, or Fire TV receiver, or if you have one of these devices plugged into your TV, you can cast from a Windows laptop. Open the Windows Settings menu, go to System, then Display. Scroll down and click "Connect to a wireless display." Your TV or streaming device should appear in the list. Click it, and Windows will send the video to the TV. The first time you do this, the TV may ask you to confirm the connection.

If your TV doesn't appear, make sure both your laptop and TV are on the same Wi-Fi network. Restart the TV's receiver or streaming device, then try again. Some older streaming devices may not show up in the Windows list — in that case, use the TV's remote to open the casting app (Chromecast, Roku, or Fire TV) and look for an option to receive a cast from your computer. Your laptop should then appear as an available device.

Casting works best for watching video, presentations, or photos. Your laptop screen stays dark, and only the content you choose to send appears on the TV. This saves battery life and lets you keep working on your laptop without the TV showing everything you do.

Screen mirroring on Windows using Miracast

Screen mirroring duplicates your entire laptop display on the TV, including your cursor, notifications, and anything you open. On Windows, this is called Miracast. To use it, open Settings, go to System, then Display. Click "Connect to a wireless display" and select your TV from the list. Your whole screen will now appear on the TV in real time.

Miracast works on most TVs made after 2012 if they have a built-in Miracast receiver, or on any TV with a Miracast-compatible device like a Microsoft Wireless Display Adapter plugged in. The downside is that Miracast uses more Wi-Fi bandwidth and laptop battery than casting does, and there can be a slight delay (usually under a second) between what you do on your laptop and what appears on the TV. This lag is usually not noticeable for watching video, but it can be annoying if you are typing or moving the mouse a lot.

Screen mirroring is useful if you need to show your entire desktop — for example, opening multiple windows, using your browser, or running software that does not have a casting option. It is also the only wireless option if your TV is very old and has no receiver built in, as long as you add a Miracast adapter.

Casting and mirroring from a Mac using AirPlay

Mac laptops use AirPlay instead of Miracast or Chromecast. To use AirPlay, your TV must either have AirPlay built in (most newer Samsung, LG, and Sony TVs made after 2018) or you must have an Apple TV device plugged into it. Open the Control Center on your Mac (click the icon in the top-right corner), click Screen Mirroring, and select your TV or Apple TV from the list. Your Mac screen will appear on the TV.

AirPlay on a Mac works like screen mirroring — your entire desktop appears on the TV. If you want to cast specific content instead (like a video or presentation) without showing your whole screen, you will need to use the app's own casting feature if it has one. For example, YouTube, Netflix, and most streaming apps have their own cast buttons built in.

If your Mac does not see your TV in the Screen Mirroring menu, make sure both devices are on the same Wi-Fi network and that your TV or Apple TV is turned on. Restart your Mac's Wi-Fi connection and try again.

What to do if your TV is too old for wireless casting

If your TV has no built-in receiver and you do not want to buy a streaming device, you can use a Miracast adapter (Windows) or AirPlay adapter (Mac). These are small devices that plug into your TV's HDMI port and receive wireless video from your laptop. Microsoft Wireless Display Adapter costs around $50 and works with Windows. For Mac, you would need an Apple TV, which costs $99 or more.

Another option is to use a USB-C or HDMI cable if your laptop has the right port. This is not wireless, but it is reliable and works on any TV. If you do not have the right cable, they cost $10 to $30 and are widely available.

Before buying an adapter, check what ports your TV has. Most TVs have at least one HDMI port. If your TV only has older ports (like VGA or component video), you may need a converter, which adds cost and complexity. In that case, a full streaming device like Roku or Fire Stick is usually a better choice.

Fixing common problems with wireless connection

If your laptop does not see your TV in the casting or mirroring menu, the most common cause is that they are not on the same Wi-Fi network. Check that both devices are connected to the same network name (SSID). Some homes have separate networks for 2.4 GHz and 5 GHz — try connecting your laptop to the same band your TV is using.

If the connection keeps dropping, move your laptop closer to the TV or router. Walls, metal objects, and other Wi-Fi networks can interfere with the signal. Restart both your laptop and TV, then try again. If you are using an older streaming device, it may not support the newer Wi-Fi standard your router uses — in that case, check the device's manual or the manufacturer's website to see if a firmware update is available.

If the video is choppy or has lag, casting usually performs better than screen mirroring. Switch to casting if your app supports it. You can also try lowering your laptop's screen resolution or closing other programs that use Wi-Fi, like downloads or video calls.

Choosing between casting, mirroring, and a wired connection

Use casting if you want to watch video, give a presentation, or show photos without your laptop screen being visible on the TV. It uses less battery and Wi-Fi bandwidth. Use screen mirroring if you need to show your entire desktop or if the app you are using does not have a casting option. Use a wired connection (HDMI or USB-C cable) if you want the most reliable connection with no lag, or if your TV is very old and has no wireless option.

For most people, casting is the best choice because it is straightforward, uses less power, and works with almost any modern TV or streaming device. If you do not have a streaming device yet, a Chromecast or Roku is cheaper and easier to set up than an Apple TV, and they work with both Windows and Mac laptops.

Frequently Asked Questions

Do I need a special app to cast from my laptop to my TV?

No. Windows and Mac both have casting built into their settings. You do not need to read anything. Some apps like YouTube and Netflix have their own cast buttons, but the operating system handles the basic casting without extra software.

Will casting drain my laptop battery faster?

Casting uses less battery than screen mirroring because your laptop is not constantly sending the entire display. However, Wi-Fi itself does use power, so your battery will drain faster than if you were just working offline. Plugging in your laptop while casting is a good idea if you plan to do it for more than an hour.

Can I use my laptop while casting to the TV?

Yes, but what you do on your laptop will not appear on the TV unless you are using screen mirroring. With casting, the TV shows only the content you chose to send, so you can browse, check email, or work on other things without the TV showing it. With screen mirroring, everything you do appears on the TV.

What if my TV is not on the same Wi-Fi network as my laptop?

Wireless casting and mirroring require both devices to be on the same network. Check your TV's Wi-Fi settings and make sure it is connected to your home network. If your TV is on a guest network or a different band, move it to the main network your laptop uses.

Is wireless casting find, or could someone else see what I am sending to my TV?

Casting and mirroring are encrypted, so someone outside your home cannot intercept the video. However, anyone on your Wi-Fi network could theoretically see that you are casting. If you are concerned about privacy, use a wired connection instead, or make sure your Wi-Fi password is strong and changed regularly.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.