Broadband Speed vs Price Calculator
A faster broadband package is not automatically a better deal — the number that actually matters is how much you are paying for each megabit of speed, not the headline speed figure on its own. A £45 gigabit package and a £25 150Mbps package can represent completely different value once the cost is broken down per Mbps, and the faster option is not always the one that wins that comparison. This calculator works out the true cost per Mbps of your current package and checks it against typical UK market rates for your speed tier.
Broadband Speed vs Price Calculator
Work out the true cost per Mbps of your broadband deal and compare it to UK market averages. Find out if you're paying over the odds for your speed.
The Real Speed You’re Paying For
Ofcom requires broadband providers to advertise a speed that at least half of customers actually achieve during peak hours, typically 8pm to 10pm — which means the advertised figure is a realistic median, not a guaranteed minimum, and real-world evening speeds commonly sit around 75% of the advertised number as more households compete for capacity on the same local network at once. This calculator uses your evening speed if you know it, or estimates it from the advertised figure if you do not, since the evening figure is generally the more honest one to judge value against.
Checking your actual evening speed is straightforward — most providers offer a speed test through their app or website, and independent speed test tools give a comparable reading. Running a test during the 8-10pm window specifically, rather than at a quiet time of day, gives the figure that most fairly reflects what you are really getting for your money.
Price Per Megabit, Not Just Price
Cost per Mbps varies by speed tier as much as by provider — higher speed tiers consistently work out cheaper per Mbps than lower ones, since a large part of a broadband bill covers the connection and equipment itself rather than scaling purely with speed. This means comparing a 36Mbps deal against a 300Mbps deal on cost per Mbps alone can be misleading; the fairer comparison is against the typical market rate for your specific speed tier, which is what this calculator checks against rather than a single blanket benchmark.
This calculator also distinguishes between a merely fair deal and a genuinely good one — sitting at the general market average for your tier is a reasonable outcome, but there is usually still room below that average where the best-priced deals for the same speed tier actually sit, which is the threshold this calculator flags as excellent rather than simply acceptable value.
More Speed Than You’ll Ever Use
Paying for considerably more speed than your household ever uses is one of the more common ways people overspend on broadband without realising it. A single person doing email, browsing and occasional streaming rarely benefits meaningfully from a gigabit connection over a well-priced 100-150Mbps one, since the bottleneck in everyday use is rarely raw download speed once a connection comfortably exceeds what is actually being asked of it. This calculator flags when your speed looks like significant overkill for the usage level you select, as a prompt to check whether a cheaper tier would perform identically for your household in practice.
Two Packages, Compared
A £25 package advertising 150Mbps works out to roughly 17p per Mbps at the advertised speed, sitting close to a typical market rate for that tier — a fair, unremarkable deal. A £45 package advertising 900Mbps works out to only 5p per Mbps, a far better rate on paper, but only genuinely useful if a household can actually make use of that much simultaneous bandwidth; for a single light user, the cheaper 150Mbps package still delivers a smoother everyday experience per pound spent, since the extra capacity in the gigabit package would sit unused.
Setting the Right Benchmark
What counts as “enough” speed depends entirely on how a household actually uses its connection at the same time, not on any single number that fits everyone. Light use — email, browsing, standard-definition streaming — is comfortable well under 50Mbps. Medium use, covering HD streaming and video calls for a couple of people, generally wants speeds in the 30-60Mbps range. Heavy use, including 4K streaming, gaming and working from home simultaneously across a household, benefits from 100Mbps or more. The busiest households, running multiple 4K streams, smart home devices and gaming at once, are where the case for 300Mbps-plus genuinely starts to hold up.
If your actual usage sits closer to the light end of that scale, it may be worth checking whether a mobile data plan could cover your needs for less than a fixed broadband line — our Mobile Data vs Home Broadband compares the two directly. If this calculator suggests you are overpaying for your tier, our Broadband Finder can help identify better-priced deals at your address.
Frequently Asked Questions
Why is my evening speed slower than advertised?
Evening hours see the most households online simultaneously, which increases demand on shared local network infrastructure. This is expected and normal to some degree, though a very large gap between advertised and actual evening speed is worth raising with your provider.
Is a higher speed tier always more expensive per Mbps?
No — generally the opposite. Higher speed tiers usually work out cheaper per Mbps than lower ones, since a meaningful part of the cost covers the connection itself rather than scaling purely with speed delivered.
What can I do if my speed is genuinely too slow?
Check whether a faster tier or a different connection type (such as full fibre, if available at your address) is offered by your current provider first, since upgrading within an existing contract is sometimes possible without a full switch or exit fee.
Does Wi-Fi affect the speed I actually get?
Yes, significantly — the speed delivered to your router is not always the speed a device receives over Wi-Fi, particularly at a distance or through walls. A wired connection, or a mesh Wi-Fi system for a larger home, can close much of that gap without needing a faster overall package.
Can I ask my provider for my guaranteed minimum speed?
Yes — Ofcom rules require providers to give you a personalised minimum guaranteed speed figure before you sign up, and to let you exit penalty-free if your actual speed falls below it and cannot be fixed within a set period.
Is upload speed as important as download speed?
For most browsing and streaming, download speed matters most, but upload speed becomes important for video calls, cloud backups and online gaming. Some connection types offer noticeably lower upload speeds relative to download than others, which is worth checking if these activities are a regular part of your usage.
Important Information
This calculator provides an estimate based on general UK market benchmarks and Ofcom guidance for general information purposes only, and does not constitute a guarantee of actual speeds or pricing at your address. Confirm exact speed estimates and pricing directly with providers before switching. See our Disclaimer for further information.