Calculator
UK Electricity Bill Calculator
Estimate electricity bill totals using unit rates, standing charges, and single-rate or Economy 7 usage patterns.
Built by Team Groat for practical household planning. Use it to compare scenarios and sense-check decisions, not as personalised financial, tax, legal, or lender-approved advice.
How to use this calculator
Enter your figures to estimate results instantly, then adjust assumptions to compare different scenarios and sense-check your household plan.
What this helps you decide
Use this calculator to compare likely electricity costs under different tariff assumptions, usage patterns, and standing charges before choosing or reviewing a plan.
What the result means
The output is most useful for comparing scenarios rather than predicting a perfect bill, because real usage, seasonal swings, and tariff structure can all shift the final amount.
Frequently asked questions
What is Economy 7 useful for?
Economy 7 can work well if you use a meaningful share of electricity overnight, but it may not help if most usage happens during daytime peak hours.
Does this account for every supplier rule?
No. It is designed for household planning, so always compare the result with the supplier’s tariff details before switching.