GuidesMarch 15, 20264 min read
What Internet Speed Do You Really Need for 4K Streaming?
Marketing numbers vs reality: the actual bandwidth requirements for smooth HD and 4K streaming, plus how to test your connection.
Internet providers love big numbers, but streaming quality depends on stable sustained speed, not peak speed. Here's what actually matters.
Real-world requirements
Sustained speeds measured at the device, not the router:
- SD quality: 4 Mbps
- HD (1080p): 10 Mbps
- 4K UHD: 25 Mbps
- 4K on two devices simultaneously: 50 Mbps
Stability beats speed
A stable 25 Mbps connection outperforms a fluctuating 100 Mbps one. If you stream on a TV box, use an Ethernet cable — Wi-Fi interference is the single most common cause of buffering we see in support.
Quick self-test
Run a speed test on the streaming device itself at the time of day you usually watch. If results vary wildly between runs, talk to your ISP about line stability before blaming the stream.