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What internet speed do you need? Mbps explained

By TabBenchHow we check our guides

Internet plans are sold in megabits per second, and it is surprisingly hard to know whether 50, 100 or 500 Mbps is enough. The honest answer depends on what you do, how many people share the connection, and often on latency and Wi-Fi quality more than on the headline number.

This guide translates Mbps into real activities, explains the difference between speed, ping and jitter, and shows how to run a speed test that tells you something useful.

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Step by step

  1. Know Mbps from MB/s

    Plans and speed tests use megabits per second (Mbps). File downloads and many apps show megabytes per second (MB/s). A byte is eight bits, so divide by eight: a 100 Mbps connection tops out around 12.5 MB/s, which downloads a 1 GB file in roughly 80 seconds.

  2. Match speed to what you do

    Browsing and email need 1 to 5 Mbps. HD video streaming uses about 5 to 8 Mbps per stream, and 4K uses about 15 to 25. A video call uses 3 to 6 Mbps in each direction. Cloud backups and large uploads benefit from 10 Mbps or more of upload. Most online games use little bandwidth but are very sensitive to latency.

  3. Add up the household

    Count simultaneous activities, not people. A household with one 4K stream (25 Mbps), two video calls (12 Mbps), a game download and background updates is comfortable at around 100 Mbps. Two people browsing and streaming HD are fine on 50 Mbps. Fibre and cable plans are often symmetrical or strongly asymmetrical: check the upload figure if you work from home.

  4. Watch latency and jitter, not just speed

    Latency (ping) is how long a message takes to make a round trip; under 50 ms is good for gaming and calls. Jitter is how much that time varies, and high jitter makes calls choppy even on a fast line. Bufferbloat is the extra delay that appears when the connection is busy, caused by oversized queues in the router. A test that measures latency under load reveals it.

  5. Test properly

    Use a cable to the router, or stand near it on Wi-Fi. Close other downloads and streams, turn off any VPN, and run the test two or three times at different times of day. Compare Wi-Fi with wired results to see whether the line or the wireless network is the limit. Expect results slightly under your plan's advertised maximum.

Things worth knowing

  • 5 GHz Wi-Fi is faster but has shorter range than 2.4 GHz. Mesh systems and moving the router to a central spot often help more than a faster plan.
  • Speed tests in a browser are limited by the device and browser; very fast lines can read lower than a native app reports.
  • Mobile connections vary a lot with signal and congestion. Measure in the place you will use it.
  • If bufferbloat is the problem, enabling SQM or smart queue management on your router is often a free fix.

Frequently asked questions

Is 100 Mbps fast enough?

For most households, yes: it supports several HD streams, video calls and downloads at once. Heavy use by many people, frequent large uploads or 4K streams on several screens benefit from 300 Mbps or more.

What is a good ping for gaming?

Under 30 ms is excellent and under 50 ms is good. Above 100 ms most fast-paced online games feel laggy. Stable jitter matters as much as the average.

Why is my Wi-Fi slower than my wired speed?

Wi-Fi speed falls with distance, walls, interference from neighbours and the number of devices. The wired figure is the line's speed. If they differ greatly, improve the wireless setup rather than upgrading the plan.

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