Superfast, ultrafast, full fibre — broadband speed terminology can be confusing. Here is a plain English guide to what superfast broadband actually means, how fast it is and whether it is enough for your household.
In this guide
What is superfast broadband?
Superfast broadband is the official Ofcom term for any broadband connection that delivers download speeds of at least 30Mbps. It became the standard residential broadband product in the UK during the 2010s and is currently available to around 96% of UK homes.
The term superfast was originally used to distinguish fibre-based broadband from much slower ADSL connections. However as broadband technology has advanced the definition has become somewhat outdated — consequently what was once considered superfast is now considered standard by many households.
Official definition: Ofcom defines superfast broadband as a connection delivering download speeds of 30Mbps or above. Furthermore the government has used this threshold to measure its broadband rollout targets across the UK.
How fast is superfast broadband?
Superfast broadband covers a wide range of speeds — from the minimum 30Mbps threshold up to around 80Mbps for standard fibre. The most commonly available superfast packages in the UK deliver average speeds of around 35-67Mbps download.
What technology does superfast broadband use?
Most superfast broadband in the UK uses a technology called Fibre to the Cabinet (FTTC). With FTTC a fibre optic cable runs from the telephone exchange to a green street cabinet near your home — however the final connection from the cabinet to your property still uses the existing copper telephone line.
This is why superfast broadband is sometimes described as fibre broadband despite not being entirely fibre. Furthermore it is also why speeds vary between properties — the longer the copper section between the cabinet and your home the slower your connection will be.
Why superfast speeds vary: Because the final stretch of a superfast connection uses copper the distance between your home and the street cabinet significantly affects your speed. Consequently a property 50 metres from the cabinet may achieve 70Mbps while one 500 metres away may only get 35Mbps on the same package.
Superfast vs ultrafast vs full fibre
The broadband industry uses several speed-based terms that can be confusing. Here is a clear breakdown of what each means:
Superfast — 30Mbps to 80Mbps
Typically FTTC technology. Fibre to the cabinet then copper to your home. Available to 96% of UK homes. Good for most households but can struggle with multiple simultaneous heavy users.
Ultrafast — 100Mbps to 999Mbps
Full fibre or cable technology. Significantly faster than superfast and more consistent. Excellent for large households, heavy streamers and gamers. Available to around 70% of UK homes.
Full fibre / Gigabit — 1Gbps+
Pure fibre optic cable from exchange directly to your home — no copper involved. Fastest and most reliable. Furthermore future-proof as the UK’s copper network is switched off. Available to around 60% of UK homes and growing.
Is superfast broadband fast enough?
For many households superfast broadband is sufficient for everyday use. However whether it is enough depends on how many people are in your household and what they use the internet for simultaneously:
✅ Single person or couple — superfast is more than adequate for streaming, browsing and video calls
✅ Small family with moderate use — superfast handles most activities well unless everyone is streaming 4K simultaneously
⚠️ Large household with heavy use — multiple 4K streams, gaming and working from home simultaneously may strain a superfast connection
⚠️ Home workers uploading large files — superfast upload speeds are typically only 10-20Mbps which can be a bottleneck for video production or large file transfers
❌ Serious gamers or content creators — ultrafast or full fibre is recommended for the lowest latency and fastest upload speeds
Is superfast broadband available at my address?
Superfast broadband is available to around 96% of UK homes — consequently it is accessible to the vast majority of households. Furthermore you can check exactly what is available at your specific address using the Ofcom broadband checker at checker.ofcom.org.uk.
The 4% of homes without superfast access are predominantly in rural areas where the distance from telephone exchanges makes FTTC unviable. If you are in this category see our rural broadband guide for alternative options.
Should I upgrade from superfast to full fibre?
If full fibre is available at your address upgrading is worth serious consideration — even if your current superfast connection feels adequate. Here is why:
⚡ Significantly faster speeds — full fibre delivers consistent speeds regardless of distance from the cabinet or time of day
📶 More reliable — no copper means no weather-related slowdowns or interference
⬆️ Much faster upload speeds — full fibre upload speeds match download speeds, making video calls and file sharing dramatically better
🔮 Future-proof — as the UK’s copper network is switched off full fibre is the long-term standard
💰 Competitive pricing — full fibre packages are now priced similarly to superfast in many areas. Consequently upgrading often costs little or nothing extra.
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Compare broadband deals →Written by the FastSwitch team · Last updated June 2026
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