Air fryer vs Conventional oven
Side-by-side comparison, when-to-use-each guide, and instant conversion. Reviewed for 2026.
1-4 portions, chips, reheating leftovers, frozen food, quick weeknight meals.
Full joints, batch baking, multiple trays, anything that needs space or moisture retention.
| Aspect | Air fryer | Conventional oven |
|---|---|---|
| Preheat time | 2-3 mins | 10-15 mins |
| Energy per use | ~0.5-1.5 kWh | ~1.5-3 kWh |
| Capacity | 1-6L typically | 40-80L |
| Crisp quality | Excellent (small batches) | Good (less concentrated airflow) |
| Annual running cost (daily use) | ~£50-90 | ~£90-160 |
Frequently asked
Can I replace my oven with just an air fryer?
For single households or couples, partially yes. Air fryers handle chips, chicken pieces, vegetables, reheating brilliantly. They can't replace an oven for large roasts, full cakes, bread, or cooking for 6+. The combination of a small air fryer + hob covers 80% of cooking for most households.
Do air fryers use less electricity than ovens?
For small portions, significantly less — an air fryer might use 0.8 kWh where a full-size oven uses 2.5 kWh for the same result. At 28p/kWh (UK 2026), that's a saving of ~48p per use. Daily use saves ~£175/year over a full oven.