Internet Speed for Streaming: Bandwidth Requirements

Household math

Add the simultaneous streams on a busy evening plus the rest of the household's use. A family of four:

• Living room TV, live sports in HD: about 8 Mbps
• Bedroom TV, on-demand series in 4K: about 20 Mbps
• Tablet, kids' show in HD: about 5 Mbps
• Video call, online game, phone updates, smart home devices: 10 to 20 Mbps

• That is roughly 45 to 55 Mbps of actual use. Add at least 50 percent headroom, since advertised speeds are maximums and Wi-Fi rarely delivers the full rate: 100 Mbps or more is comfortable here.
• A single-person apartment with one HD stream and a laptop is comfortable at 25 Mbps; two 4K TVs and heavy gaming should look at 200 Mbps and up.
• A service's stream limit is separate from bandwidth: a multi-stream plan does not help if the connection cannot carry them, and a fast connection does not lift the cap. Limits are in the comparison table.

Wi-Fi vs. wired

Most streaming problems in homes with adequate plans are Wi-Fi problems: walls, distance, neighbors' networks, and older devices cut the speed a TV actually receives. Fixes, in order of effectiveness:

1. Run an Ethernet cable to the main TV or box; most streaming devices and nearly all smart TVs have a port.
2. Move the router to a central, elevated spot away from metal and thick walls.
3. Use the 5 GHz band (or 6 GHz on Wi-Fi 6E and Wi-Fi 7 routers) for streaming devices; faster and less congested at short range.
4. Add a mesh system if there are dead zones; a node near the far TV usually solves it.
5. Replace an old router. A decade-old router can bottleneck a fast plan.

Streaming sticks behind a TV get weak Wi-Fi because the TV blocks the signal; a short HDMI extender that lets the stick sit clear of the TV body can help.

Data caps

• Some ISPs cap monthly data and charge overages; streaming is the main consumer, and 4K the main consumer within streaming.
• Rough guide: an hour of HD uses on the order of 1 to 3 GB, an hour of 4K several times that; exact figures depend on encoding, and each provider publishes its own estimates.
• Several hours a day, some in 4K, can reach hundreds of gigabytes a month. With a cap, check your provider's usage meter after a typical month and consider HD rather than 4K where the difference is not noticeable.

Latency and live sports

• Bandwidth is how much data arrives per second; latency is how long it takes. For on-demand it barely matters, because the app buffers ahead.
• For live sports: a high-latency or unstable connection buffers more, since live streams cannot buffer far ahead; and every live stream runs tens of seconds or more behind the broadcast regardless of your connection. A faster plan does not reduce that delay.
• If you watch with friends on cable or follow a live score feed, expect to be behind; an antenna for broadcast games is the only way to match cable's timing. See our sports considerations guide.

How to test your speed

• Test at the device that is having trouble, not at the router; many streaming devices and smart TVs have a built-in network test, and Netflix maintains a browser speed test site.
• Run it three times: house quiet, busy evening, and right after a buffering episode. Compare to your plan's advertised speed and the per-stream table.
• If the device test is far below a laptop wired to the router, the problem is Wi-Fi. If both are far below the plan speed, the problem is the connection, which is a conversation with your ISP.

Fixing buffering

• Restart the streaming device and the router; it clears a surprising number of issues.
• Check what else is using the connection: large downloads, cloud backups, and game updates can consume everything.
• Lower the stream quality in the app's settings if the connection is marginal.
• Switch the device to the 5 GHz band or wire it.
• Update the device's software and the app.
• If one service only, check its status page; outages happen on big sports nights.
• If it persists on every device and service, test at the router and call the ISP.