Free · UK units · No sign-up
Calculators for the questions around a purchase
The sums that decide a purchase and the ones that follow it. What a laptop or a mini PC left on all day adds to the bill at the current price cap, whether the router you have your eye on will even work with BT, Virgin Media or Sky, and whether the contract the shop is pushing beats buying the phone outright. Pounds, pence and megabits, and they work on a phone.
- Router matcher
Which Router Works With My Broadband?
Pick your provider and package and see how it connects, whether you can use your own router, and which of our picks fit.
RoutersOpen it → - Running cost calculator
Laptop, Monitor and Mini PC Running Cost Calculator
Hours a day, the current price cap rate, and the real power draw of the machine: what a laptop, a monitor or a mini PC adds to a UK electricity bill.
LaptopsMonitorsMini PCsPortable MonitorsOpen it → - Cost comparison
SIM-Free vs Contract Calculator
Your numbers, not the shop's: the phone outright plus a SIM-only plan against a phone-and-airtime contract, over the whole term, with the annual rises counted.
PhonesOpen it →
Why these exist
Built for the questions people actually ask
Most tech sites stop at the recommendation. The questions that come before and after it are the ones asked on the BT Community, r/UKBroadband and r/UKPersonalFinance every week: will this router work with my provider, is it worth replacing the hub they sent, what does a machine left on for Plex cost a year, is the contract really cheaper than buying the phone. The answers exist, spread across help pages, forum threads and spreadsheets.
Everything here uses UK providers, UK tariffs and UK rules, cites the pages the numbers came from, and links to the picks we already rank when the sums say it is time to buy. They are free, they never ask for an email, and no number on them comes from Amazon.
Something missing? A broadband speed-to-resolution checker, a laptop battery-life estimator and a monitor size-and-distance chart are next.