UK Electricity Cost Calculator

Uses the current Ofgem price cap (Jul–Sep 2026). Estimate your whole bill, or find out exactly what one appliance costs to run.

✓ Free to use ✓ Current Ofgem rates ✓ 12 appliance presets ✓ Shareable results

What do you want to calculate?

Average Usage (kWh/day)

Billing Period (days)

▸ Adjust rates (your actual tariff)

Unit Rate (p/kWh)

Standing Charge (p/day)

✨ More around the house

Current Ofgem Price Cap (Jul–Sep 2026)

	Unit rate	Standing charge
Electricity	26.11p/kWh	57.19p/day
Gas	7.33p/kWh	29.04p/day

GB average, Direct Debit, VAT included. The price cap is reviewed quarterly — if your tariff differs, adjust the rates above to match your actual bill.

Standing charge: the part usage-cutting doesn't touch

The standing charge is fixed per day regardless of how much you use — at 57.19p/day that's already £208.75/year before a single kWh is counted. It's why a near-empty holiday home still gets a real bill, and why cutting usage alone has diminishing returns on your total cost.

What appliances actually cost

A kettle (3000W) run for 5 minutes a day costs about 4p/day — trivial. An EV home charger (7kW) run for 4 hours a day costs roughly £7.31/day, or £2,668/year — by far the single biggest line item most households will ever add. A tumble dryer used once a day (2500W, ~13 minutes average) costs about £50/year. Knowing the actual gap between "feels expensive" and "is expensive" is the point of the appliance mode above.

Rates sourced from Ofgem — Energy Price Cap, current for the Jul–Sep 2026 period. The price cap changes quarterly and varies slightly by region and payment method — check your actual bill or supplier for your exact rate.

Frequently Asked Questions

Why does my actual bill differ from the price cap estimate?+

The price cap sets a maximum rate, not a fixed price — your supplier, payment method (Direct Debit vs prepayment vs cash), and region all shift the exact number slightly. Use the "adjust rates" section with your actual tariff for a precise figure.

Is it cheaper to run appliances at night?+

Only if you're on a time-of-use tariff (like Economy 7) with a genuinely cheaper night rate — on a standard single-rate tariff, electricity costs the same at 3am as at 3pm.

How much does an EV charger really add to my bill?+

A 7kW home charger running 4 hours a day adds roughly £2,668/year at the current price cap — but most EV drivers charge less often than daily and many switch to a dedicated EV tariff with a much cheaper overnight rate, which changes the maths significantly. See 5 more appliances’ real annual cost →