How Many Mbps Do I Need for Netflix in 4K?
Netflix buffering is almost always a speed or stability problem. Here are the exact numbers Netflix recommends, and how to check if your connection clears them.
Netflix speed requirements
- SD (480p): 1–3 Mbps
- HD (1080p): 5 Mbps
- 4K Ultra HD: 15–25 Mbps per stream
But speed isn't the whole story
You can have 200 Mbps and still buffer if your connection is unstable. Bufferbloat (latency spiking under load) and packet loss cause the dreaded mid-show spinning wheel even on fast plans. Run our test and check the bufferbloat grade and stability — not just the download number.
Multiple streams add up
Two 4K streams at once need ~50 Mbps; a busy household streaming, gaming and on calls wants 100+ Mbps with low bufferbloat.
Quick fixes for Netflix buffering
Connect your TV by Ethernet, move closer to the router, lower other devices' usage, and reboot the router. Re-test after each change.
Free, instant, no app — see your download, upload, ping & bufferbloat.
Run the speed test →