Short answer: an air fryer is faster, crisps better and usually uses less electricity for small batches of 1–4 portions. An oven or OTG is better for large quantities, big cakes and trays of food. Most kitchens get the most out of having both. Here’s how they compare in detail.
Air fryer vs oven (OTG): comparison table
| Air fryer | Oven / OTG | |
|---|---|---|
| How it heats | Element close to food + powerful fan in a small chamber | Top and bottom elements, sometimes a convection fan, in a large chamber |
| Preheat time | 0–5 min | 10–15 min |
| Cooking speed | Faster, often 20–30% quicker | Slower |
| Crispness | Excellent | Good (best with convection) |
| Capacity | 2–12 L; 1–4 portions per batch | 16–60 L; full trays |
| Typical power | 1,200–1,800 W | 1,200–2,000 W for OTGs; more for built-in ovens |
| Baking | Small cakes, muffins, cookies in batches | Large cakes, bread loaves, multiple trays |
| Cleaning | Dishwasher-safe basket | Trays plus interior walls and glass |
| Counter space | Small footprint | Larger |
Which uses less electricity?
For small batches the air fryer usually wins, because it preheats in minutes and cooks faster. Here’s a worked example for a batch of potato wedges:
| Air fryer (1,500 W) | OTG (1,600 W) | |
|---|---|---|
| Preheat | 3 min | 12 min |
| Cook | 20 min | 30 min |
| Energy (if the element ran the whole time) | ~0.58 kWh | ~1.12 kWh |
| Cost at ₹8 per unit (example) | ~₹4.60 | ~₹9.00 |
Both appliances cycle their heating element on and off once hot, so real usage is lower than shown. The comparison still holds. Your tariff will differ; check your electricity bill for your per-unit rate. For a full breakdown see do air fryers use a lot of electricity?
When to use the air fryer
- Snacks: samosa, cutlets, pakodas, fries
- Tikkas and roasted vegetables: paneer tikka, aloo gobi
- Reheating anything that should be crisp: pizza, quiche, samosas
- Cooking for 1–4 people on weeknights
When to use the oven or OTG
- Large cakes, bread loaves and multiple trays of cookies
- Cooking for guests in one go
- Large dishes like a full tray of biryani dum or a lasagne
- Recipes needing even, gentle heat over a long time
Can an air fryer replace an oven?
For a small family that mostly makes snacks, tikkas, roasted vegetables and small bakes, often yes. For regular baking, big batches or entertaining, an air fryer complements an oven rather than replacing it. Oven-style air fryers with shelves bridge the gap; see best air fryers with shelves.
Converting oven recipes to the air fryer
Lower the temperature by about 15–20 °C (25 °F) and reduce the time by around 20%, checking at the halfway point. Full guide: air fryer temperature guide.
Frequently asked questions
Is an air fryer better than an oven?
For speed, crispness and small portions, yes. For capacity and large bakes, an oven is better.
Is an air fryer just a small convection oven?
Essentially, yes. It’s a compact convection oven with a stronger fan and the heating element closer to the food, which is why it browns faster.
Can I bake a cake in an air fryer instead of an OTG?
Yes, in a 15–18 cm tin at 150–160 °C. See our air fryer cake recipe.