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What The Air Fryer vs Oven Cost Calculator Works Out
- Oven per use: cooking minutes x a fan oven's average draw of about 1.2kW once the thermostat is cycling (preheat included), at the current Ofgem price cap unit rate. The 2kW to 3kW element on the plate misleads: once at temperature it cycles well below its peak, which is why measured comparisons land closer than the labels suggest.
- Air fryer per use: its minutes x an average draw of about 1.0kW. It heats a few litres instead of seventy and skips most of the preheat, so chips or a pair of chicken breasts that occupy an oven for 45 minutes finish in 25 at a lower draw, roughly halving the electricity per cook.
- Yearly saving: the per-meal difference x meals per week x 52. Genuine but modest, pence per meal; a daily habit compounds it to GBP 30-odd a year.
- Unit rate and average draws (advanced): use your tariff and the figures from a plug-in energy monitor, the definitive referee. A big double oven or an old non-fan oven averages more; a small 3-litre air fryer less.
- Portions per batch and per-portion cost (advanced): the gap closes and can invert with scale. An air fryer cooks one drawer's worth, so the family roast that fills three oven shelves costs less per portion in the oven, batch cooking amortises the big cavity, and dual-drawer air fryers exist to chase this arithmetic upward.
- Payback on the air fryer (advanced): the purchase price divided by the annual saving. Dividing a GBP 60 to GBP 150 purchase by pence-per-meal savings gives honest answers between one and four years for regular users and never for the cupboard-bound impulse buy; the real conquest of the British kitchen ran on convenience (no preheat wait, less oil, crispness the microwave cannot fake) as much as cost.
- Extra preheat (advanced): adds minutes the oven runs before the food goes in, if your cooking time does not already include them.
- Electricity per year (advanced): the kilowatt-hours each appliance uses over the year's meals, for comparing with the rest of the kitchen.
- Microwave instead (advanced): the same meal reheated or steamed in a 1kW microwave for your minutes, which beats everything for reheating and vegetables. The slow cooker sips 100-odd watts across its long day to a similar total, and the hob depends on pan discipline.