Broadband providers advertise speeds in the hundreds of megabits per second, but most people have little sense of what those numbers mean in practice. Is 100 Mbps enough? Would 500 Mbps make a noticeable difference? And why does your connection feel slow at 9pm even though you are paying for “superfast” broadband?
This guide cuts through the numbers and gives you a straightforward, honest answer to what broadband speed your household actually needs, based on what you do online and how many people are doing it at the same time.
How broadband speed is measured
Broadband speed is measured in megabits per second (Mbps) or gigabits per second (Gbps). The higher the number, the more data can flow through your connection in a given time. A 500 Mbps connection can move roughly five times as much data per second as a 100 Mbps connection.
Two numbers matter: download speed and upload speed. Download speed governs how quickly data arrives at your device, affecting streaming, web browsing, and downloading files. Upload speed governs how quickly data leaves your device, affecting video calls, sending files, live streaming, and cloud backup. Most people focus on download speed, but upload speed is equally important for anyone who works from home or makes regular video calls.
There is also latency, sometimes called ping, which measures the delay between sending a request and receiving a response. For most activities latency is invisible. For online gaming it is critical, and a connection with low latency but modest speed will almost always perform better in games than a fast connection with high latency.
What speeds do common online activities require?
These are the minimum recommended speeds for each activity. Where multiple people in a household are doing these things simultaneously, the speeds add together.
- Web browsing and social media: 5 to 10 Mbps is more than sufficient for comfortable browsing, loading images, and scrolling social feeds. This is not where most households run into problems.
- HD video streaming: Netflix recommends 5 Mbps for HD quality on a single screen. Amazon Prime and Disney+ have similar requirements. For most streaming at HD quality, 10 Mbps per stream is a comfortable working figure.
- 4K streaming: Netflix recommends 25 Mbps for a single 4K stream. If two people in the same household are watching 4K on separate screens simultaneously, you need 50 Mbps just for that. Three screens watching 4K needs 75 Mbps. Most ADSL connections simply cannot sustain this.
- Online gaming: The data requirement for online gaming is actually modest, typically 3 to 10 Mbps download. What matters far more is latency. A ping below 30ms is comfortable for most games, below 20ms is excellent, and above 60ms you will start to notice lag in fast-paced multiplayer. For more detail on this, the broadband-for-gaming page explain what to look for in a gaming broadband connection.
- Video calls: Zoom recommends 3.8 Mbps upload and 3.8 Mbps download for HD group calls. Microsoft Teams has similar requirements. Where this becomes a problem is on connections with slow upload speeds. Many FTTC “superfast” packages offer strong download speeds but relatively limited upload, which causes the pixelation and freezing that is common in video calls. A 1080p video call requires around 3 Mbps upload, meaning three people in the same household on simultaneous video calls need around 9 Mbps upload capacity, which is beyond what some part-fibre connections reliably deliver.
- Working from home: The speed requirements depend on what your job involves. Basic remote working with email, document editing, and occasional video calls is manageable on a mid-speed connection. VPN access to a corporate network, transferring large files, accessing remote desktops, or hosting video calls with screen sharing all push requirements higher. For a full breakdown, the broadband-for-working-from-home page on our site cover this in detail.
- Cloud gaming: Xbox Cloud Gaming, GeForce Now, and PlayStation Plus Premium stream the game from a remote server to your screen, which means the data requirements are closer to 4K streaming than traditional gaming. Microsoft recommends 20 Mbps for 1080p cloud gaming and higher for better quality settings.
Calculating the speed your household needs
The simplest way to estimate your household’s broadband requirement is to add up the peak simultaneous demand across all the people and devices in your home.
Take a household of four people on a typical weekday evening. One person is streaming 4K Netflix (25 Mbps). Another is on a video call (4 Mbps down, 4 Mbps up). A third is gaming online (5 Mbps down, low latency required). The fourth is working late, transferring files over a VPN (20 Mbps up and down). The household is simultaneously running a smart speaker, two phones on Wi-Fi, and a smart TV in the background.
Total demand: around 60 to 80 Mbps download, 25 to 30 Mbps upload at peak. A superfast FTTC connection rated at 67 Mbps download but only 15 Mbps upload would struggle noticeably in this scenario. A full fibre connection starting at 115 Mbps symmetrical would handle it comfortably.
Why you might have enough speed on paper but slow performance in practice
This is one of the most common and frustrating broadband experiences in the UK. You are paying for a headline speed, your speed test at 2pm shows something reasonable, but in the evenings everything feels slow.
There are several reasons this happens. The most common on FTTC connections is network congestion. FTTC uses shared infrastructure at the street cabinet and in the exchanges, meaning that as more people in your area come online at the same time, the available bandwidth is divided. Evening peaks, particularly in residential areas, regularly cause speeds to drop significantly below the headline figure.
Distance from the cabinet is another factor. FTTC speed degrades with distance. A home 100 metres from the cabinet may receive close to the advertised speed. A home 800 metres away may receive half that or less.
Full fibre connections are not subject to either of these constraints in the same way. The dedicated fibre connection to your home does not share bandwidth with your street, and there is no copper degradation over distance. This is why full fibre connections consistently deliver speeds that match what you signed up for, at any time of day.
What speed tier should you choose?
Rather than trying to calculate an exact figure, it helps to think in tiers based on your household’s size and usage patterns.
- Light usage, 1 to 2 people: Basic streaming, browsing, occasional video calls. 100 to 150 Mbps full fibre is more than sufficient and will feel dramatically faster than a superfast FTTC connection if that is what you currently have.
- Moderate to heavy usage, 2 to 4 people: Mix of streaming, working from home, gaming, and video calls running simultaneously. 200 to 500 Mbps is a comfortable range. Carnival Internet’s Boost package at 550 Mbps is designed precisely for this kind of household.
- Heavy usage, 4 or more people, or power users: Multiple 4K streams, serious gaming, cloud gaming, regular video calls, large file transfers, or a smart home with many connected devices. 500 Mbps to 1,000 Mbps gives you the headroom to run everything without any activity affecting another. Our Max package delivers up to 1,000 Mbps for exactly this scenario.
Does your router affect speed?
Yes, significantly. Even with a fast full fibre connection, a poor quality or outdated router can limit the Wi-Fi speeds you experience on your devices. This is particularly relevant in larger homes where the router struggles to distribute signal evenly to all rooms.
The solution is either a more capable router or a mesh Wi-Fi system, which uses multiple nodes placed around the home to create seamless, whole-home coverage. eero mesh routers, which are available as an add-on to any Carnival Internet package, are designed to eliminate the dead zones and coverage gaps that affect many homes with a single router. Adding eero 7 or eero Max 7 to a Carnival Internet connection gives you both the full fibre speed and the Wi-Fi infrastructure to actually deliver it to every device in the house.
What about latency and gaming?
Speed tests measure how much data can flow through a connection, but they do not measure latency directly. For gamers, latency matters as much as speed, and the two are not the same thing.
Full fibre broadband consistently delivers lower latency than FTTC or ADSL because the signal travels faster along fibre optic cable and because there are fewer congestion points in the network. On Carnival Internet’s network, typical latency is well under 20ms, which is excellent for competitive multiplayer gaming on any platform.
For more on why latency matters in gaming and what to look for in a gaming broadband connection, the broadband for gaming guide covers this in depth.
How to check what you are currently getting
If you want to measure your current broadband speed accurately, use a wired connection from your router rather than Wi-Fi, as Wi-Fi adds variability that can mask your true connection speed. Run the test at different times of day, particularly in the evening, and compare the results to your advertised speed. A significant gap between your subscribed speed and your actual measured speed, particularly in the evenings, is a strong indicator that you are on a congested FTTC network rather than full fibre.
Checking what is available at your address
If your current connection is not delivering the speed or consistency you need, the first step is to check whether full fibre broadband is available at your address. Carnival Internet covers parts of Bristol, Leeds, Edinburgh, Aberdeen, Belfast, Cardiff, and Reading, with our network expanding regularly.
Enter your postcode on our coverage checker to see what is available at your specific address, and visit our packages page to compare our Go, Boost, and Max speed tiers.
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