Latency, ping and jitter explained

Cloudflare, a web infrastructure company, separates three ideas that often get blurred:

• Bandwidth is the most data that can pass through a connection at a time. Roughly, it's what a package's Mbps figure describes.
• Throughput is the average amount of data that actually gets through in practice.
• Latency is a measure of time, not of how much data moves.

An illustration, not a technical model: think of bandwidth as the number of lanes on a road and latency as how long the journey takes. More lanes don't bring the destination closer; they only help when the road is jammed.

For the capacity side, see our guide to download and upload speeds.

Latency is the time data takes to travel between two points on a network. Ping is the everyday name for the test that measures it. A ping test sends a tiny packet of data from your device to a server and times how long it takes for the reply to come back. That is how Community Fibre, a UK full fibre provider, explains it, adding that a lower ping means a more responsive connection, especially for things like online games.

Because a ping goes there and back, it measures the round-trip time (RTT). Cloudflare notes that the round trip is double the one-way latency. So a ping figure is the whole journey there and back, not one way.

Unlike speed, lower is better. And there is a floor: Cloudflare lists the distance between your device and the server as one of the main causes of latency, and says latency can never be removed entirely.

Which server you ping matters

A ping figure only describes the server it was measured against. A game uses its own servers, not necessarily the one a speed test picks, and a far-off game server adds delay no home fix will remove. Our suggestion: if tests look fine but one game still lags, check whether that game shows your ping to its own server, as that is the figure that applies to that game.

Data travels across the internet in small chunks called packets. For a call or a game, those packets are normally sent at regular intervals and expected to take about the same time to arrive. Jitter is what happens when they don't: some arrive on time, some late. It is about consistency rather than the average, so a decent average ping can still feel bad. Microsoft describes it as media packets arriving at different rates.

What causes jitter

Community Fibre lists congestion on a busy network; route changes, where packets take different paths and so different times; faulty or overloaded hardware; wireless interference from other devices; and buffering, where equipment holds packets back while coping with congestion.

What jitter looks and sounds like

Community Fibre's list of symptoms: choppy or garbled audio on internet calls, video calls or streams that freeze or pixelate, stuttering or sudden lag spikes in online games, and file or data transfers that fail or become corrupted. Microsoft says jitter on a call can cause missing words or syllables.

Packet loss is when one or more packets sent across a network never reach their destination.

Community Fibre's list of causes overlaps with jitter: congestion that overwhelms a network's capacity, faulty routers, switches or cables, software bugs or misconfiguration, wireless interference or obstructions, bandwidth limits when traffic is heavy, and firewalls or security tools dropping packets they consider suspicious.

On a call, Microsoft says packet loss lowers voice quality and makes speech hard to understand.

How much is acceptable? We found no single household target. Xbox's network troubleshooting guide simply says 0% packet loss is best, and to look for a reduction when you re-test after changes. If a test regularly shows any packet loss on a wired connection, that is worth investigating.

We found no official UK standard for "good" latency on home broadband, only rules of thumb. They agree that lower and steadier is better but draw the lines in different places (all checked October 2026):

If your ping is comfortably low and steady, latency is unlikely to be what's spoiling things; the higher and more variable it gets, the more you'll notice. Note that the gaming figures are far stricter than Teams' "Poor" line, which is a warning for IT admins, not a target: Microsoft says Teams can compensate for considerable network degradation before users notice. For games, ping, jitter and packet loss all matter; our guide to broadband for online and cloud gaming goes into the specifics.

The technology that reaches your home sets a baseline for latency before Wi-Fi or busy evenings add anything. We found few current independent figures, so here is what we did find and how old it is.

Two things to note. ISPreview described even ADSL's 24 ms as "fine", and it is well inside the gaming rules of thumb above. And Ofcom said its 2023 home broadband report would be the last of its annual speed reports; we found no newer Ofcom comparison of latency by technology, so treat these as a pattern rather than exact numbers for today. The satellite rows are Starlink's figures, not Ofcom's.

Full fibre, cable and copper

Community Fibre says it advertises a ping of 0 to 10 ms on its own network, a provider's claim rather than an independent measurement. If low latency matters to you, our fibre broadband deals page lets you compare what is available at your postcode, and the guide to what full fibre is explains how it differs from part-fibre.

4G and 5G home broadband

4G or 5G home broadband, a form of fixed wireless access (FWA), uses a hub that turns a mobile signal into Wi-Fi. Three's home broadband works this way. The Ookla figures in the table put Standalone 5G (built end to end on 5G) ahead of Non-Standalone 5G (which partly relies on 4G equipment), but a hub at your address could do better or worse: Three says results depend on hub position, line of sight to the nearest mast, local topography, the number of users and the thickness of walls and windows. Our guide on whether 4G or 5G can replace fixed broadband weighs up the trade-offs.

Other fixed wireless services use a receiver on your home linked to the provider's own local transmitters. Quickline works this way where it doesn't offer full fibre: it provides one or the other depending on the address. We found no independent latency figures for fixed wireless of either kind, so ask the provider (see the questions below).

Satellite

The gap in the table comes down to distance: Starlink says traditional satellites sit in geostationary orbit 35,786 km up, while its own orbit at around 550 km. We haven't seen an independent UK measurement of either.

The UK's broadband Universal Service Obligation (USO) is a legal right to request a connection with at least 10Mbps download and 1Mbps upload. The law itself sets no latency number: it requires latency good enough to make and receive voice calls effectively. The USO specification, as reported by ISPreview, puts that at no more than 200 ms end to end for speech, and when the USO launched in 2020 ISPreview said this ruled out satellite (at the time, meaning geostationary services). In July 2026 Ofcom told ISPreview that Starlink's availability means fewer people may need to request a USO connection. Our guide to satellite broadband in the UK covers the options in full.

If the line itself is sound, these are the places to look, roughly from closest to furthest away.

Wi-Fi

Xbox's troubleshooting guide sorts Wi-Fi problems into three kinds. Active interference comes from other devices sending signals, such as microwaves, wireless headsets (which broadcast on the same frequency as routers), baby monitors, other wireless networks, cordless phones and wireless speakers. Passive interference is the signal being weakened by what it passes through, such as concrete, glass, lead and copper piping, insulation, mirrors, filing cabinets, tile and plaster. And attenuation is the signal fading with distance. Community Fibre lists wireless interference as a cause of both jitter and packet loss.

Someone else is using the connection

PlayStation's Remote Play troubleshooting advice points out that other devices on your network may be using a lot of bandwidth, and suggests pausing downloads on them. In a typical home that might be a games update, a cloud photo backup or someone streaming in another room.

Bufferbloat

Bufferbloat is the name for extra latency caused by a router or other network equipment holding too much data in its buffers (queues). When the line is busy, packets wait in the queue and smooth traffic turns stuttery. Bufferbloat.net, a community project working on the problem, says the giveaway is ping times that jump up while you are uploading or downloading. It says bufferbloat is relatively easy to fix with smarter queue management, such as a technique called fq_codel; the steps are below.

Busy times on the network

Congestion is one of the causes of jitter and packet loss listed above. If lag only appears at busy times, our guide to why broadband slows down in the evening explains how to tell your network from your provider's and what your rights are.

The server, the route or the game

Distance to the server sets a floor you can't fix at home, and some multiplayer problems aren't latency at all. Xbox's NAT type (Open, Moderate or Strict) decides who you can play with and whether you can host a game; Strict can only play with people on Open NAT and can't host. Double NAT, where both a provider's hub and your own router do NAT, can cause problems; Xbox suggests bridge mode. Our guide to CGNAT, static IP and IPv6 explains the provider side of this.

Traffic management

Ofcom's October 2023 net neutrality guidance lets providers manage traffic and sell premium low-latency packages if they are clear with customers. If you suspect certain traffic is being slowed, see our guide on whether your provider can slow down or block websites.

A one-off number tells you little. Test under different conditions to see where the problem appears.

1. Pick your tools. Community Fibre suggests tools such as Speedtest by Ookla or PingPlotter for checking jitter as well as ping. Bufferbloat.net lists web tests that measure latency while the line is busy, including the Waveform Bufferbloat Test (which gives a letter grade) and the Cloudflare Speed Test. On an Xbox, press the Xbox button, then go to Profile & system > Settings > General > Network settings > Test network speed & statistics; it reports download, upload and ping. For download and upload speed, you can also use our broadband speed test.
2. Test wired first. Connect a laptop or console to the router by Ethernet cable and test with nothing else busy. That is your baseline.
3. Test on Wi-Fi from the same spot as your problem device. If ping, jitter or packet loss get much worse on Wi-Fi, the problem is most likely in your home rather than the line.
4. Test while the line is busy. Bufferbloat.net's quick check: run a continuous ping, start a speed test to load the line, and watch the ping times. If they jump up while uploading or downloading, your router is probably suffering from bufferbloat. Bufferbloat.net treats a loaded latency above about 50 ms, or a grade lower than B, as high.
5. Test at different times. Repeat at a quiet time and at peak time. A wired result that only goes bad in the evening suggests congestion somewhere beyond your home rather than your own equipment.
6. Write it down. Note the time, wired or Wi-Fi, and the ping, jitter and packet loss figures. Xbox advises writing down your results because it makes the conversation easier if you contact your provider, and dated results give the provider something concrete to investigate.

• Use a cable for the device that matters. Community Fibre's first suggestion for improving latency is a wired Ethernet connection instead of Wi-Fi, and PlayStation's Remote Play advice suggests a wired connection on a PC or Mac where possible. See our guide to wired Ethernet at home.
• If you must use Wi-Fi, use 5GHz and get closer. PlayStation's Remote Play advice suggests the 5GHz band. Community Fibre suggests restarting the router and moving it into an open spot away from interference, and Xbox suggests a clear line of sight and getting devices out of cabinets; see our tips on improving your Wi-Fi signal.
• Pause the big jobs. For Remote Play, PlayStation advises pausing downloads on other devices and disconnecting other Wi-Fi devices; Community Fibre suggests limiting how many devices are doing heavy things at once.
• Turn on Quality of Service (QoS) if your router has it. QoS lets the router give priority to chosen traffic, such as gaming or video calls. Community Fibre recommends it, though Bufferbloat.net says adjusting a router's QoS is a hassle and only helps a bit with bufferbloat.
• Look for a bufferbloat fix. If your tests showed ping soaring under load, check your router's settings or manual for Smart Queue Management (SQM), which uses techniques such as fq_codel or cake. Bufferbloat.net's method: measure your speeds with SQM off, turn it on with the upload and download set to those figures, then keep re-testing and adjusting until latency stays low with good speeds. Bufferbloat.net adds that an expensive router, even a "gaming" one, won't necessarily help.
• Keep devices updated, another of Community Fibre's suggestions.

Will a faster package help? Community Fibre suggests a higher-speed plan as one option, but more capacity doesn't shorten the distance to a server, and Bufferbloat.net argues that link speed is not the cause of bufferbloat, so a faster line won't cure it. More capacity mainly helps a household that regularly fills its line. If your wired, quiet-time ping is already poor, more Mbps on the same technology is unlikely to fix it.

If wired tests still show high latency, heavy jitter or packet loss after you've tidied up at home, report it to your provider with your test log. If it can't be fixed, or your contract is ending, a different type of connection may help more than a faster package. On Ofcom's March 2023 figures full fibre was generally below 8 ms against around 24 ms for ADSL; where only slow copper reaches, compare low Earth orbit satellite and fixed wireless options too, and ask each provider about latency.

Questions to ask a provider before signing up:

• What technology will my address get: full fibre, part-fibre, cable, 4G/5G or fixed wireless?
• Do you publish typical latency for your network, and how is it measured?
• Do you use traffic management, and does it affect gaming or video calls?
• Does your router support QoS or bridge mode, and can I use my own?
• For a wireless service, is there a signal survey or a trial period?

To see which deals are available at your address, enter your postcode in the comparison on our fibre broadband page. It is run by our partner and compares live deals, not latency. You can also browse all the broadband providers we cover, including regional networks such as Community Fibre, or check broadband deals by area.