The fastest way to get your computer screen on your TV

Screen sharing sends what you see on your computer monitor to your television in real time. The method depends on what hardware you own — whether your TV has built-in wireless capability, what operating system your computer runs, and whether you want a permanent cable connection or wireless casting.

Most modern TVs and computers can connect wirelessly using Miracast (Windows), AirPlay (Mac and iPhone), or Chromecast (Google devices and many smart TVs). If wireless does not work or you need a stable connection for long periods, an HDMI cable remains the most reliable option.

Key Takeaways

  • Wireless screen sharing works fastest when your computer and TV are on the same Wi-Fi network and within 30 feet of each other.
  • Windows computers use the built-in "Connect" app to cast to Miracast-compatible TVs; Mac computers use AirPlay to cast to Apple TV or AirPlay-enabled smart TVs.
  • If your TV does not support wireless casting, a Google Chromecast device or Amazon Fire Stick plugged into an HDMI port adds wireless capability for under $40.
  • An HDMI cable connected directly from your computer to the TV works on any TV model and requires no setup, but limits where you can sit.
  • Lag and disconnections usually mean your Wi-Fi signal is weak; moving closer to your router or switching to the 5 GHz band often fixes the problem.

Wireless casting with Windows and Miracast

Windows 10 and Windows 11 include a built-in casting feature called Connect that works with any TV that supports Miracast. To use it, both your computer and TV must be on the same Wi-Fi network.

Open the Windows Settings menu, go to System, then select Display. Scroll down and click "Connect to a wireless display." Windows will search for nearby Miracast devices. When your TV appears in the list, click it. Your TV will show a PIN code; enter that code on your computer to confirm the connection. Once paired, your computer screen will appear on the TV.

If your TV does not appear in the list, check that Miracast is enabled in your TV's settings — the location varies by manufacturer, but it is usually under Display, Network, or Wireless settings. If the TV still does not show up, restart both devices and try again. Some older TVs do not support Miracast; if yours does not, a Chromecast or Fire Stick will add the feature.

Wireless casting with Mac and AirPlay

Mac computers use AirPlay to cast wirelessly, but only to Apple TV devices or to newer smart TVs that have AirPlay built in. Samsung, LG, Sony, and Vizio have added AirPlay support to many recent models, but not all.

To check if your TV supports AirPlay, look in the TV's settings under AirPlay or Apple. If it is there and enabled, your Mac will find it automatically. Click the Control Center icon in the top-right corner of your Mac screen, select Screen Mirroring, and choose your TV from the list. Your Mac screen will appear on the TV within a few seconds.

If your TV does not support AirPlay, you can buy an Apple TV device (the smallest model costs around $100) and connect it to an HDMI port on your TV. Once set up on your Wi-Fi network, any Mac in your home can cast to it. Alternatively, a Chromecast device works with Mac computers and costs less.

Using a Chromecast or Fire Stick for any TV

If your TV does not have built-in wireless casting, a Google Chromecast or Amazon Fire Stick plugged into an HDMI port adds the feature. Both devices cost between $30 and $50 and work with Windows, Mac, and mobile devices.

Plug the device into an available HDMI port on your TV and connect it to power. read the Google Home app (for Chromecast) or Alexa app (for Fire Stick) on your computer or phone, follow the setup steps to connect the device to your Wi-Fi, and name it. Once set up, you can cast from any device on the same network.

To cast from a Windows computer to Chromecast, open Chrome browser, click the three-dot menu, select "Cast," choose your Chromecast device, and pick whether to cast your entire screen or just a single tab. For Mac, the process is the same if you use Chrome. If you use Safari on Mac, you will need to use AirPlay instead or switch to Chrome.

Connecting with an HDMI cable

An HDMI cable is the most straightforward connection and works with any TV and any computer. Plug one end into your computer's HDMI port and the other into an available HDMI port on your TV. Your TV should detect the input automatically; if it does not, use your TV remote to switch to the correct HDMI input number.

HDMI cables are inexpensive (usually $10 to $20) and create a stable, lag-free connection with no setup required. The main drawback is that you are tethered to the TV — if your computer is across the room, you will need a long cable. HDMI also does not work if your computer lacks an HDMI port; many newer laptops use USB-C or Thunderbolt instead, in which case you will need an adapter.

If your computer has USB-C or Thunderbolt, you can buy a USB-C to HDMI adapter for $15 to $30. Plug the adapter into your computer, connect an HDMI cable to the adapter, and plug the other end into your TV. The process is identical to a direct HDMI connection.

Fixing wireless connection problems

If your computer and TV keep disconnecting or the image lags, the problem is usually a weak Wi-Fi signal. Move your computer closer to your Wi-Fi router, or move the router closer to your TV. If that is not possible, check whether your router supports the 5 GHz Wi-Fi band — it offers faster speeds over shorter distances than the 2.4 GHz band. In your computer's Wi-Fi settings, look for a network name ending in "5G" or "5GHz" and connect to that instead.

If you are still having trouble, restart both your computer and TV, then try connecting again. If the problem persists, check that your TV's firmware is up to date — many TV manufacturers release updates that improve wireless stability. Look in your TV's settings under System Update or Software Update.

If wireless casting continues to fail after these steps, switch to an HDMI cable or a Chromecast device. Both eliminate Wi-Fi as a variable and will work reliably even if your wireless network is congested.

Choosing between wireless and wired for different situations

Use wireless casting when you want flexibility — presenting from different parts of the room, switching between devices, or avoiding visible cables. Wireless works well for watching videos, browsing the web, or giving presentations where you move around.

Use an HDMI cable when you need a rock-solid connection with no lag, such as gaming, video editing, or any situation where a dropped connection would be frustrating. HDMI is also the right choice if your Wi-Fi is unreliable or if your computer and TV are far apart.

For most people, having both options available is ideal — use wireless most of the time, and keep an HDMI cable nearby for situations where stability matters more than convenience.

Frequently Asked Questions

Do I need to buy anything if my TV is brand new?

Most TVs made in the last five years have wireless casting built in, but the feature may be turned off. Check your TV's settings under Network, Wireless, or Display to see if Miracast, AirPlay, or Chromecast is available. If it is there and enabled, you do not need to buy anything — just connect your computer and TV to the same Wi-Fi network.

Can I screen share from my phone to the TV using the same method?

Yes, if you use the same casting technology. iPhones use AirPlay, Android phones use Miracast or Chromecast, and both work the same way as computers. Open your phone's Control Center or Quick Settings, look for Screen Mirroring or Cast, and select your TV. The connection process is identical.

What if my computer does not have an HDMI port?

Check what ports your computer has — USB-C, Thunderbolt, DisplayPort, or Mini DisplayPort are common on newer laptops. You can buy an adapter that converts any of these to HDMI for $15 to $40. Plug the adapter into your computer, connect an HDMI cable, and plug the other end into your TV.

Will screen sharing work if my computer and TV are on different Wi-Fi networks?

No. Both devices must be connected to the same Wi-Fi network for wireless casting to work. If you have a guest network on your router, make sure both your computer and TV are on the main network, not the guest network.

Can I use screen sharing while my computer is locked?

No. Your computer must be awake and unlocked for casting to work. Once the connection is established and your screen appears on the TV, you can lock your computer and the image will remain on the TV, but the initial pairing requires your computer to be active.