How much does an electric oven cost to run?
At Ofgem's Great Britain Direct Debit comparison rate of 26.32p per kWh for 1 October to 31 December 2026, a labelled cycle using 0.71kWh costs about 18.69p. A 0.81kWh cycle costs about 21.32p. These are worked examples, not UK-average oven figures: copy the consumption from your own oven label and the unit rate from your electricity bill.
An oven does not normally draw its full rated power continuously. It uses substantial power while heating, then the thermostat cycles the elements on and off to maintain temperature. That is why multiplying the maximum kilowatt rating by the whole cooking time can overstate normal consumption, although it can provide a cautious upper bound.
- 0.71kWh fan cycle: 0.71 × 26.32p = 18.69p.
- 0.81kWh conventional cycle: 0.81 × 26.32p = 21.32p.
- Four 0.71kWh cycles a week: 147.68kWh a year, costing about £38.87.
- A maximum 2.5kW draw for one full hour: 2.5kWh and 65.80p, but thermostat cycling usually makes this an upper-bound estimate rather than the actual use.
Calculate your oven cost from the energy label
GOV.UK's domestic-oven label specification includes energy consumption per cycle in kWh for conventional heating and, where available, fan-forced heating. It also identifies the cavity volume and efficiency class. The per-cycle values are measured with a standard load, so they give a consistent basis for comparing models and modes.
Choose the kWh figure for the mode you plan to use, then multiply it by your tariff's pence-per-kWh rate. Divide by 100 if you want the answer in pounds. For an oven labelled 0.81kWh conventional and 0.71kWh fan-assisted, the examples above show a difference of 0.10kWh, or about 2.63p per standard cycle at the illustrative rate.
A label cycle will not predict every recipe exactly. Preheating time, selected temperature, food quantity, cooking duration, door opening and automatic programmes all change demand. Treat the label as a repeatable comparison and planning figure, then use a suitable whole-home monitor or smart-meter usage data if you want to investigate actual sessions.
Calculate from watts and cooking time
If you cannot find the label, check the rating plate or manual for the input power. Divide watts by 1,000 to get kilowatts, multiply by hours, then multiply by your unit rate. For example, 2,500W is 2.5kW; a theoretical hour at full power is 2.5kWh, costing 65.80p at 26.32p/kWh.
Do not present that full-power result as the oven's measured hourly cost. Once hot, thermostatic control normally means the elements are not energised for every minute. A plug-in monitor is only appropriate for an oven that uses a normal plug and when the monitor is explicitly rated for the load; many ovens are hardwired and should not be altered for measurement.
For a practical household estimate, compare smart-meter or home-energy-monitor readings immediately before and after a representative cooking session, while allowing for other appliances operating at the same time. Repeat on similar meals if you want a more stable estimate.
Use your own tariff and treat standing charges correctly
Ofgem's 26.32p figure is an average comparison rate for standard-variable-tariff customers paying by Direct Debit in England, Scotland and Wales. Your price can differ by region, payment method, meter and tariff. Fixed and time-of-use deals can also be above or below the comparison rate, so use the unit rate shown on your own bill.
Northern Ireland has a separate electricity market. The Utility Regulator approves the maximum tariff charged by the regulated supplier, Power NI, while other suppliers compete against it. Northern Ireland households should therefore use their supplier's actual unit rate rather than Ofgem's Great Britain example.
Do not add the daily standing charge to every oven session. You pay that household charge whether the oven is used or not. Include it once when calculating the complete electricity bill, while appliance comparisons should use only the electricity consumed and the applicable unit rate.
Fan oven, air fryer or microwave: which costs less?
Energy Saving Trust says an air fryer is generally cheaper than an electric oven for the same small meal because its cooking space is smaller. Its tested example priced a 600g chicken breast at 14p in an air fryer and 20p in an electric oven in Great Britain. Those figures apply to the specific tested food and appliances, so they are useful comparisons rather than universal tariffs.
An oven can be better value when its larger cavity is used for several portions or dishes at once. Batch cooking spreads the preheat and hot-cavity energy across more food; later portions can often be reheated in a microwave, which heats food directly and is usually cheaper for quick reheating.
Choose the appliance that fits the quantity and recipe. Moving a large meal into several small air-fryer batches may remove the expected saving, while heating a full oven for one small portion can waste capacity.
Ways to reduce electric oven energy use
Avoid opening the door unnecessarily because heat escapes and the oven must recover the temperature. Use the window and light where possible. Cook several suitable items together, and plan shelf positions before opening the door so it stays open for less time.
Preheat only when the recipe or food-safety instructions require it. Match the cavity or appliance to the portion, use fan-assisted mode when it suits the recipe and manufacturer guidance, and switch off when cooking is complete. Energy Saving Trust also recommends defrosting frozen food in the fridge before cooking and using batch cooking to make better use of an oven's capacity.
Do not replace a safe working oven solely because a simple cost example looks lower for a new model. Compare the label's kWh per cycle, how often you cook, purchase and installation cost, and the likely remaining life of the existing appliance.
Use an electric oven safely
Electrical Safety First advises that ovens can draw substantial power and may need hardwiring or a dedicated circuit. Installation and repairs should be handled by a qualified electrician. Never improvise an extension lead or adaptor for a high-power oven, and follow the manufacturer's requirements.
Keep tea towels, oven gloves and other flammable materials away from the appliance. Do not use the oven to heat the room or as cupboard storage, do not block vents, and never leave food cooking unattended. Let the oven cool before cleaning it.
Stop using the appliance and seek competent help if you notice scorch marks, unusual buzzing or crackling, repeated blown fuses, circuit-breaker trips or excessive heat around a plug or socket. Energy savings should never override safe cooking or electrical practice.
Electric oven running cost FAQs
How much does an electric oven cost per hour?
There is no single accurate hourly figure because an oven cycles its heating elements. A 2.5kW rating gives a 65.80p full-power upper-bound hour at 26.32p/kWh, but a label's kWh-per-cycle figure or measured session is usually more useful.
Is a fan oven cheaper to run?
It can use less energy for the standard label cycle. Compare the conventional and fan-assisted kWh-per-cycle figures on your model, and follow the cooking instructions because temperature and time also matter.
Is an air fryer cheaper than an electric oven?
Often for one or two portions, because the smaller cavity heats quickly. A full oven may be better value for batch cooking or a large meal. Compare the total kWh needed to cook the same quantity of food.
Does preheating use much electricity?
Preheating is part of the session and uses energy while the oven reaches temperature. Skip it only when the recipe, food-safety guidance and appliance instructions allow; some foods need a fully heated oven for safe or reliable results.
Should I include the standing charge in oven cost?
No. The standing charge is paid for the household supply whether the oven runs or not. Use the unit rate for an oven calculation and add the standing charge once in your full electricity-bill estimate.
Calculate your appliance running costs
Enter watts and hours or kWh per cycle, then compare costs for different usage patterns.
Estimate your electricity bill
Use the appliance cost calculator for one cooking session, or add your oven kWh to the rest of your household use in the main bill calculator. Use your actual unit rate and count the standing charge only once for the home.
Sources
Tariff figures, oven-label requirements, cooking-efficiency advice, Northern Ireland regulation and oven safety guidance were checked against these sources on 26 October 2026: