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 by following the steps below.
Adjust your data usage settings
Sign in to Netflix.com.
Select the profile you'd like to change your data usage settings for.
Under My Profile, select Playback Settings.
Select your desired data usage setting:
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)
Select Save. Your changes will take effect within 8 hours.
Data usage settings only apply to the Netflix profile you set them from, meaning 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, make sure to change this setting for each profile.
If you are interested in managing your cellular data usage on individual mobile devices, visit How do I manage mobile data usage on Netflix?