Watching TV shows or movies on Netflix uses about 1 GB of data per hour for each stream of standard definition video, and up to 3 GB per hour for each stream of HD video. Downloading and streaming consume a similar amount of data. If you are concerned with data caps or bandwidth limits, you can adjust your data usage settings.
Netflix data usage options
Netflix offers 4 data usage settings:
Low: 0.3 GB per hour per device
Medium: SD: 0.7 GB per hour per device
High: Best video quality, up to 3 GB per hour per device for HD, and 7 GB per hour per device for Ultra HD
Auto: Adjusts automatically to deliver the highest possible quality, based on your current internet connection speed
Adjust your Netflix data usage settings
You can have different data usage settings for each profile on your account. If you are concerned about the total amount of data that Netflix uses, repeat the steps below for each profile.
From a web browser, go to your Account page.
From Profile & Parental Controls, select a profile.
Select Change for Playback settings.
Select your desired data usage setting.
Save changes. Your changes will take effect within 8 hours.
Mobile data usage options
Netflix has 4 mobile data usage settings:
Automatic: Netflix selects a setting that balances data usage with good video quality. You can watch about 4 hours per GB of data.
Wi-Fi Only: Streams only when the device is connected to Wi-Fi.
Save Data: Watch about 6 hours per GB of data.
Maximum Data: Recommended only for unlimited data plans. Streams at the highest possible quality for your device and the content you are viewing. This may use 1 GB per 20 minutes or more depending on your device and network speeds.
Adjust your mobile data usage settings
Data setting changes you make from your mobile device apply when that device is streaming over mobile networks. To select the setting that works best for your mobile data plan:
Open the Netflix app and tap More or Profile .
Select App Settings.
Under Video Playback, select Cellular Data Usage.
Choose your preferred setting.