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The short answer: for a family of four, 5 to 6 quarts (about 5 to 6 litres) in a single basket, or about 8 quarts split between two baskets if you want the chicken and the potatoes to finish together. For five or six people, 7 to 8 quarts, or more as two baskets.
Those numbers come from one maker’s own rating and one rule of cooking that USDA spells out: food only crisps properly in a single layer. Choose your household, then see how it works.
Find your air fryer size
How many people do you usually cook for?
Do you want to cook a main and a side at the same time?
5 to 6 quarts (about 5 to 6 litres)
At a little over a litre per portion, four people need about 5 litres of basket.
See this size on AmazonCapacity figures describe the whole basket, but food crisps properly only in a single layer. USDA advises cooking in batches rather than overcrowding.
Why the quart figure overstates what fits
USDA describes air fryers as “essentially countertop convection ovens”: a fan blows hot air around the food. The capacity on the box is the volume of the basket, but hot air can only crisp what it can reach. USDA’s air fryer guidance warns that “overcrowding the appliance can prevent enough air circulation to properly cook the food”, advises cooking large amounts in batches, and says not to overfill the basket “to avoid uneven cooking and undercooking.”
So what really decides how much you can cook at once is the floor area of the basket, not its depth. Two air fryers with the same quart figure can hold very different amounts of chips (fries) in one layer. Most makers give the basket’s dimensions in the specifications or manual: compare those, not just quarts.
Air fryer sizes by household
| Household | Single basket | Two baskets (main and side) |
|---|---|---|
| 1–2 people | 2–4 quarts (about 2–4 L) | 5–6 quarts in total |
| 3–4 people | 5–6 quarts (about 5–6 L) | About 8 quarts in total |
| 5–6 people | 7–8 quarts (about 7–8 L) | 9–10 quarts in total |
| 7 or more | 10 quarts or more; expect a second batch | 10 quarts or more, or an oven-style fryer |
Our anchor is Philips’s own rating: its 7.3-litre Airfryer XXL will “serve up to six portions”, or “up to 1.4 kg of fries”. That works out at a little over a litre of basket per portion, and we’ve scaled the table from it. Makers rate their fryers differently, so treat any “feeds X” figure as a best case and check the basket floor.
One basket or two?
- Two baskets cook a main and a side at once, each at its own temperature and time, and many dual models can time both to finish together. The catch: each basket is only half the total, so a whole chicken or a large frozen pizza may not fit in either.
- One big basket takes whole items and big single batches, but everything cooks at one temperature.
- Oven-style models spread food over racks, which adds floor area, but they take up more counter space.
Quarts or litres?
US air fryers are sold in quarts, UK ones in litres. One US quart is 0.95 litres: 2 quarts is 1.9 litres, 4 quarts 3.8, 5 quarts 4.7, 6 quarts 5.7, 8 quarts 7.6 and 10 quarts 9.5.
Check before you buy
- Space around it. Air fryers push hot air out of a vent, and the manual says how much clearance to leave. Measure your counter, including the depth.
- Maximum temperature. USDA says most foods need 5 to 25 minutes at 350 to 400°F (about 175 to 200°C), so a fryer that reaches 400°F covers everyday cooking.
- A basket you can put in the dishwasher. Check the manual, not just the listing.
Cooking safely in an air fryer
- Follow the packet for frozen foods, as USDA advises, and allow for your own fryer’s size and power.
- Use a thermometer. The usual safe minimum temperatures apply: poultry 165°F (74°C), minced meat 160°F (71°C), whole cuts of beef, pork, veal and lamb 145°F (63°C) with a 3-minute rest, and fish 145°F (63°C). Our temperature chart has UK guidance too.
- Don’t air-fry raw, stuffed, breaded chicken breast products, the frozen kind with a filling. USDA specifically says not to cook these in an air fryer; follow the packet’s instructions.
- Refrigerate leftovers within two hours.
Picks by household
Families of 3–4
A 5- to 6-quart single-basket air fryer
Good for: a family of three or four
- The basket’s floor dimensions, not just quarts
- Reaches 400°F (200°C)
- Dishwasher-safe basket
Main and side at once
An 8-quart dual-basket air fryer
Good for: families who want the main and the side ready together
- The size of each basket on its own
- Whether it can time both baskets to finish together
- Counter depth
5 or more
A 10-quart dual-basket or oven-style air fryer
Good for: five or more
- Counter space and clearance
- Whether a whole chicken fits in one basket
Everyone
A digital probe thermometer
Good for: checking meat and leftovers, whatever you cook them in
- Reads in a few seconds
- Covers at least 0–200°F (about −18 to 93°C)
- A thin probe, so it doesn’t leave a big hole
Deciding between appliances? See what size slow cooker and what size Instant Pot.
How we put this together: from the makers’ own published ratings and manuals, and food-safety guidance from USDA and a university extension service, each read on 24 September 2026 and linked where it is used. We have not tested these appliances ourselves and don’t claim to have. This guide tells you what size and type to look for; it is not a ranking.
