PowerGuardian Tools

    UK Energy Bill Calculator

    Estimate your electricity, gas or dual-fuel bill using separate unit rates and standing charges for each fuel.

    See all your savings in one place

    Enter your home details once and get personalised savings, supplier picks, recommended actions, calculators and guides on My PowerGuardian.

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    Figures reviewed June 2026 and updated monthly where appropriate. All results are estimates.

    Rates include VAT (5%)

    UK price-cap rates already include VAT. Turn this off only if you're entering ex-VAT figures — VAT is added once.

    Electricity

    Enter your annual usage in kWh.

    Enter your unit rate in pence per kWh.

    Enter your standing charge in pence per day.

    Gas

    Enter your annual usage in kWh.

    Enter your unit rate in pence per kWh.

    Enter your standing charge in pence per day.

    The Ofgem price cap limits unit rates and standing charges, not the total amount a household can pay. Your actual bill depends on your energy use, region, meter and payment method.

    Enter valid values for the selected fuel(s) to see your estimated bill.

    Frequently Asked Questions

    Compare Your Energy Costs

    Use PowerGuardian to understand your energy costs before switching supplier or changing tariff.

    View Energy Guides

    Explore the Knowledge Centre

    Find related calculators, guides and reports in our Energy Bills hub — part of the PowerGuardian Knowledge Centre.

    Energy Bills HubKnowledge Centre

    Save these results to My PowerGuardian

    Keep this in your personalised energy hub alongside your savings, supplier picks and tailored recommendations.

    Explore this topic

    Energy bills and the price cap

    Read the UK energy bills and price cap guide for the full picture.

    Related guides

    PowerGuardian research

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    Energy Bill Calculator

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    Standing Charge Calculator

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    Should I Switch Energy Supplier?

    Is switching worth it right now? A decision framework using the current cap and fixed-deal evidence.

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    Compare Energy Suppliers

    Independent PowerGuardian scores out of 100 for relevant suppliers, as at 11 August 2026.

    British Gas

    55/100

    The UK's largest supplier remains financially rock-solid but service and complaint metrics continue to lag the market, with smart-meter billing delays a recurring theme.

    Compare Supplier

    EDF Energy

    74/100

    EDF is a steady, financially robust supplier with mid-table service and fair fixed-tariff renewals. Few surprises in either direction.

    Compare Supplier

    Octopus Energy

    91/100

    Octopus continues to lead the UK market on customer service and complaint handling, backed by genuinely competitive smart tariffs and strong financial backing. The clear front-runner on our intelligence dashboard.

    Compare Supplier

    Frequently Asked Questions

    Quick answers to the questions people ask most about this topic.

    Free PowerGuardian Report

    Standing Charges Report

    A deep dive into the daily fixed fees on every UK bill — regional differences, drivers and the case for reform.

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