Generally, as the quality of the streaming video increases, a higher Internet speed will be required for a smooth experience. For instance, streaming SD (480p) video will require less speed than compared to HD (720p/1080p) video.
Here are minimum speed recommendations for some of the most frequently streamed channels on Roku; Netflix (1.5 Mbit/s), Hulu (1.5 Mbit/s), YouTube (0.5 Mbit/s), Amazon Instant Video (0.9 Mbit/s), SlingTV (3.0 Mbit/s).
Roku recommends that you check with the specific channel for Internet speed requirements, considering factors like the desired video quality. If you find that you need more speed, it's time to contact your Internet Service Provider (ISP).
To check the Internet speed on your Roku Streaming Stick, install the Speed Test channel.
To check the Internet speed on a computer, use one of these following sites:
Results from tests using a computer may differ from those on the Speed Test channel on Roku, due to various factors. Any test result is intended to provide a general idea of the measured download speed.