The fastest way to cast depends on what device you own

Casting sends video, audio, or your entire screen from a phone, tablet, or computer to your TV. The method changes based on what you're casting from and what receiver you have plugged into your TV. If you have a Chromecast device, you use the Cast button built into most apps. If your TV has Chromecast built in, the process is identical. For other devices like Roku, Fire TV, or Samsung Smart TVs, you'll use their own casting systems instead.

The core steps are the same across all platforms: make sure your casting device and your TV receiver are on the same Wi-Fi network, open an app that supports casting, tap the Cast icon, and select your TV. The whole process takes under a minute once everything is set up.

Key Takeaways

  • Your phone, tablet, or computer and your TV receiver must be connected to the same Wi-Fi network before casting will work.
  • Most streaming apps (YouTube, Netflix, Spotify, Google Photos) have a Cast button you tap to send content to your TV.
  • Casting your entire screen or desktop requires a different method than casting from within an app, and not all devices support it.
  • If the Cast button doesn't appear, restart your Wi-Fi router, forget and rejoin the network, or restart the app.

Casting from an Android phone or tablet to Chromecast

Open any app that supports casting — YouTube, Netflix, Spotify, Google Photos, or Chrome are the most common. Look for the Cast icon, which looks like a rectangle with curved lines in the corner (like a TV with a signal). It usually appears in the top or bottom right of the screen. Tap it.

A menu will pop up showing all Chromecast devices on your network. Select the one connected to your TV. The app will confirm the connection, and video or audio will start playing on your TV within seconds. To stop casting, tap the Cast icon again and select "Stop casting."

If the Cast icon doesn't appear, the app may not support casting. Check the app's settings or help section to confirm. YouTube, Netflix, Spotify, Google Play Music, Hulu, Disney+, and most major streaming services do support it.

Casting from an iPhone or iPad to Chromecast

iPhone and iPad casting works the same way as Android, but only if the app developer has added Chromecast support. Open the app, look for the Cast icon, and tap it. Select your Chromecast device. The app will begin playing on your TV.

Not all apps support Chromecast from iOS. YouTube, Netflix, Spotify, and Disney+ do. If an app doesn't have a Cast button, you can cast your entire screen instead using AirPlay to an Apple TV, but that requires an Apple TV device, not a Chromecast. For Chromecast specifically, you're limited to apps that have built-in Cast support.

Casting your entire screen or desktop

If you want to share your whole screen — not just one app — the process differs. On Android, open Settings, search for "Cast," and select "Cast your screen" or "Wireless display." Your phone will scan for receivers. Select your Chromecast. Your entire screen will mirror to the TV, and anything you do on your phone will appear there.

On a Windows computer, press the Windows key + K to open the Quick Settings panel. Select "Connect to a wireless display." Choose your Chromecast. Your desktop will appear on the TV. On a Mac, open Control Center (top right), click "Screen Mirroring," and select your Chromecast if it appears. Note that Macs sometimes require a third-party app for full Chromecast support.

Screen mirroring uses more bandwidth than casting a single app and may cause lag or stuttering, especially on older Wi-Fi routers. If you're just watching a video or listening to music, casting from the app itself is faster and more reliable.

What to do if casting isn't working

The most common reason casting fails is that your phone and TV receiver are on different Wi-Fi networks. Check that both devices show the same network name in their Wi-Fi settings. If you have a 5 GHz and 2.4 GHz network with the same name, try connecting both devices to the 2.4 GHz band — Chromecast devices sometimes struggle with 5 GHz.

If they're on the same network and the Cast button still doesn't appear, restart the app. Close it completely and open it again. If that doesn't work, restart your Wi-Fi router by unplugging it for 30 seconds. Then restart your phone. These steps fix the majority of casting problems.

If the Cast button appears but selecting your TV does nothing, restart your Chromecast device. Unplug it from power for 10 seconds and plug it back in. Wait for it to boot up fully — the light will stop blinking — then try casting again. If you still have trouble, forget the Wi-Fi network on your phone and rejoin it by entering the password again.

Casting to non-Chromecast devices

If your TV has a different casting system built in — Roku, Fire TV, Samsung SmartThings, or LG WebOS — the Cast button in apps may not work. Instead, look for the device maker's own casting button. Roku uses "AirPlay" and "Cast" buttons depending on the app. Fire TV devices use their own casting system. Samsung and LG TVs have their own mirroring buttons in the phone's quick settings.

Check your TV's manual or the device maker's website to see which casting standard it supports. Many newer TVs support multiple standards, so you may have options. If your TV doesn't have any casting built in, you can add a Chromecast device, Roku, or Fire TV stick to any TV with an HDMI port.

Frequently Asked Questions

Do I need a Chromecast device if my TV already has it built in?

No. Many newer TVs from Samsung, LG, Sony, and other brands have Chromecast built into the TV itself. You can cast directly to the TV without a separate device. Check your TV's settings or manual to confirm it has Chromecast. If it does, you'll see it listed when you tap the Cast button on your phone.

Can I cast if I'm not on Wi-Fi?

No. Casting requires both devices to be on the same Wi-Fi network. You cannot cast over cellular data or Bluetooth. If you're away from home, you can use a mobile hotspot from your phone to connect your TV receiver, but this uses your phone's data and may be slow.

Why does casting lag or stutter?

Lag usually means your Wi-Fi signal is weak or your router is overloaded. Move closer to the router, reduce the number of devices connected, or restart the router. Screen mirroring lags more than app casting because it sends more data. If you're mirroring your screen, try casting from the app instead.

Can I cast from multiple phones to the same TV at once?

Most Chromecast devices only play one source at a time. If a second person tries to cast while something is already playing, it will take over and replace what's on screen. Some newer Chromecast devices support a queue feature where multiple people can add videos to a playlist, but only one plays at a time.

What if the Cast button is grayed out?

A grayed-out Cast button usually means no Chromecast devices are detected on your network. Check that your TV receiver is powered on and connected to Wi-Fi. Restart your phone's Wi-Fi and try again. If the button stays grayed out, the app may not support casting, or your devices are on different networks.