Calculators
Free bill calculators
Free calculators for your bills: the broadband speed you need, the mobile data you use and your energy bill on today's price cap. Each one takes seconds and links straight to the best-value deals for your answer.
Broadband speed calculator
Count what your home does at its busiest moment and see the download and upload speed you need, then the best-value deals at that speed.
Mobile data calculator
Tell us what you do away from Wi-Fi in a typical week and see the monthly data you need, then the cheapest SIM-only plans for it.
Energy bill calculator
Put in the energy you use a year and see your bill on today's Ofgem price cap, split into units and standing charges, and how your own tariff compares.