Real-World Running Costs: Oven vs Air Fryer vs Microwave

Which appliance costs the least to run for everyday meals? With energy awareness higher than ever, many households want a clear, real-world comparison between using the oven, the air fryer and the microwave. This guide breaks down typical wattages, cooking times and meal examples to show exactly where your money goes.

We’ve focused on the meals most UK homes cook regularly — from reheating leftovers to cooking chicken or baking potatoes — to help you choose the most cost-effective method each time.

For more ways to save energy in the kitchen, visit the CATA advice hub or browse energy-efficient CATA hobs.

Typical Energy Use Per Appliance

*Based on 34p per kWh.

Meal-by-Meal Cost Comparison

1. Reheating Leftovers

• Microwave: 3–4 minutes → ~2p
• Air fryer: 6–8 minutes → ~5–7p
• Oven: 10 minutes preheat + 10 minutes cook → ~20–25p

2. Chicken Breast (Single Portion)

• Microwave (steam settingMicrowave steam modes cook quickly while keeping the chicken moist.): 8–10 minutes → ~4–5p
• Air fryer: 15 minutes → ~12–14p
• Oven: 20–25 minutes → ~30–35p

3. Frozen Chips

• Air fryer: 12–15 minutes → ~10–12p
• Oven: 20 minutes preheat + 20 minutes cook → ~45–50p
• Microwave: Not recommended for texture reasons

4. Jacket Potato

• Microwave: 8–10 minutes → ~4–5p
• Air fryer: 35 minutes → ~28–32p
• Oven: 60 minutes → ~70–85p

At-a-Glance: Quick Facts

So Which Should You Use?

For day-to-day cooking, the microwave is the clear winner on running costs — ideal for reheating, steaming and quick meals. The air fryer is the next most efficient, perfect for crispy foods and smaller portions without long preheating times. The oven, while the most expensive, is still the best choice when you’re cooking multiple portions or large dishes.

Choosing the right appliance for each task can reduce your monthly energy spend significantly — without compromising on convenience or flavour.