An air fryer’s electricity use comes down to one simple sum: its wattage multiplied by how long you run it. Most air fryers draw between 800 and 2,100 watts, and because they heat a small chamber quickly, they usually use less energy than a full-size oven for small meals — even though the oven has a lower running cost per minute, it takes far longer to heat a much bigger space. The key is that you rarely run an air fryer for long.
The formula: watts x time = energy
Every appliance’s energy use is measured in kilowatt-hours (kWh) — the unit your electricity provider bills you for. To find how much energy a single cook uses:
- Find the wattage on the rating label (usually on the base or back) or in the manual.
- Divide by 1,000 to get kilowatts. A 1,500-watt air fryer is 1.5 kW.
- Multiply by the cooking time in hours. Twenty minutes is 0.33 hours.
- Multiply by your electricity rate (the price per kWh on your bill) for the cost.
So a 1,500-watt air fryer running for 20 minutes uses about 1.5 kW × 0.33 h = 0.5 kWh. Multiply that 0.5 kWh by whatever your provider charges per kWh and you have the exact cost for that cook. Because rates vary widely by region and provider, working from your own bill gives a far more accurate number than any fixed price online.
A quick reference table
Here’s how the same formula plays out across common wattages and cook times, in kWh (multiply by your own rate for cost):
| Air fryer wattage | 10 minutes | 20 minutes | 30 minutes |
|---|---|---|---|
| 800 W | 0.13 kWh | 0.27 kWh | 0.40 kWh |
| 1,200 W | 0.20 kWh | 0.40 kWh | 0.60 kWh |
| 1,500 W | 0.25 kWh | 0.50 kWh | 0.75 kWh |
| 1,800 W | 0.30 kWh | 0.60 kWh | 0.90 kWh |
These are rough figures. The heating element cycles on and off to hold temperature rather than running flat out the whole time, so real energy use is often a little lower than the table suggests. Treat these as an upper-bound starting point.
Why an air fryer often beats the oven for small meals
A conventional oven has a large cavity to bring up to temperature, and preheating alone can take 10 to 15 minutes before you even start cooking. An air fryer heats a much smaller space, often needs little or no preheat, and cooks many foods faster. Less time and less space to heat usually means less total energy for a small portion, even though the oven itself may draw fewer watts overall.
For a large batch or a big roast, though, the oven can be the more efficient choice, since one oven load may replace several air fryer batches. The advantage flips based on how much food you’re cooking. Our air fryer vs convection oven comparison breaks this down in more detail.
Simple ways to keep running cost down
- Skip unnecessary preheating for foods that don’t need it, and don’t run the basket empty.
- Cook in a single layer so food crisps in one batch instead of two.
- Match the size to the meal — a smaller model heats a smaller chamber. See are air fryers worth it for the bigger cost picture.
- Don’t open the drawer more than needed, since each opening drops the temperature and makes the element work harder to recover.
A note on cooking times: figures like 20 minutes are starting points, not fixed rules — times vary by model, portion size and how full the basket is, so always check for doneness. For meat and poultry, cook to a safe internal temperature measured with a food thermometer: 165°F (74°C) for poultry, 160°F (71°C) for ground meats, 145°F (63°C) for whole cuts of beef, pork and fish (with a brief rest for whole cuts).
Related questions
Do air fryers use a lot of electricity? Not for typical use. High wattage sounds like a lot, but most cooks run 10 to 25 minutes, so the actual kWh per meal is small. It’s the short run time, not the wattage alone, that keeps the cost low.
Is it cheaper to use an air fryer than an oven? For small meals and single portions, usually yes, because you heat a much smaller space for less time. For large batches, a single oven load can be more efficient than several air fryer rounds.
Does a higher-wattage air fryer cost more to run? Per minute, yes — but higher-wattage models often cook faster, so the total energy for a given meal can end up similar. Run time matters as much as wattage.
To weigh the running cost against everything else, see whether air fryers are worth it and how they stack up in our air fryer vs convection oven guide, or start from the homepage for more.