How Much Internet Speed Do I Need?

The right speed depends on how many people are online at once and what they're doing. Choose your household size and activities, and the calculator adds up what each service recommends, with 25 % headroom so things stay smooth.

Why households need more than the sum

Activities overlap: a 4K film, two video calls and a game update can all run at the same time. The calculator assumes everyone you choose is active at once, which is the moment a slow connection is most noticeable. It then adds 25 % headroom for the things nobody thinks about — phones updating, photos syncing to the cloud, smart-home devices checking in.

Where the numbers come from

Each activity uses what the service itself recommends: Netflix suggests 5 Mbps for a Full HD stream and 15 Mbps for 4K, and Zoom about 3.8 Mbps up and 3.0 Mbps down for a 1080p group call. Online gaming needs very little bandwidth while you play, but large game downloads use as much as you have. The calculator rounds up to the nearest common plan size.

Don't forget upload

Video calls, cloud backups and livestreams use upload. If several people work from home, upload speed is often the real limit — check yours with the upload speed test. Many cable and DSL plans have plenty of download but only a tenth as much upload, so compare both figures when choosing a plan. More in what is a good upload speed.

Speed isn't the only thing that matters

A fast plan can still feel slow if ping is high or jumps when the line is busy. For gaming and calls, a good bufferbloat grade (A or B) matters as much as raw speed. The speed test shows both, and what is bufferbloat explains why.

Compare with what you get today

Run the speed test with a cable at your busiest time of day and compare the result with the calculator's recommendation. If you're already above it but things still feel slow, the problem is probably Wi-Fi or your router, not your plan — see why is my internet slow. If you're below it, a faster plan will help.

Common results

One or two people usually need 25–100 Mbps. Families of three or four are comfortable around 100–200 Mbps. Big households with several 4K TVs, gamers and remote workers do best with 200–500 Mbps. Beyond that, extra speed mostly shortens large downloads. See what is a good internet speed and is 100 Mbps fast for more detail.

Plan for the next few years

Households tend to add screens and devices over time, and video quality keeps rising. If you're signing a long contract, leaving extra room above today's result is sensible.