What Size Air Fryer Do I Need? Litres by Household Size

Air fryer sizes are quoted in litres, but two models with the same capacity can hold very different amounts of food. Buying too small means cooking in batches every night; buying too big means a bulky machine taking over the worktop.

This guide explains how to read the numbers and match them to how you actually cook. It does not recommend specific brands — the principles apply to any model.

What the litre figure means

Manufacturers quote the total volume of the basket or drawer. But you rarely fill an air fryer to the top — food crisps best in a single layer, or at most two shallow layers that you shake.

That makes the floor area of the basket more useful than its depth. A wide, shallow 5-litre basket may hold more chicken thighs than a deep, narrow 6-litre one. Where retailers list internal dimensions, compare the width and length of the basket floor.

Size by household

These are starting points rather than rules; consider how much you eat and what you cook most.

• One person or a student kitchen: around 2–3.5 litres. Enough for a portion of chips and a chicken breast.
• Two people: around 3.5–5 litres. Room for two portions of a main and a side, or a couple of jacket potatoes.
• Three to four people: around 5–7 litres in a single basket, or a dual-drawer model.
• Five or more, or batch cooking: a large single basket, a dual-drawer model or an air fryer oven with shelves.

Single basket vs dual drawer

A dual-drawer air fryer has two separate cooking zones, each with its own element. You can cook chicken in one at 190°C and chips in the other at 200°C, and many models can sync them to finish at the same time. That is a real advantage for full meals.

The trade-off is that each drawer is smaller than a single large basket of the same total capacity, so a whole chicken or a big tray bake may not fit. If you mostly cook one-dish meals or large items, a single wide basket may suit you better.

Air fryer ovens

Air fryer ovens look like small mini-ovens with a door and shelves. They can cook on two or three levels and often fit a small pizza or a rotisserie chicken. They tend to be less intense at crisping than a basket model, and food on different shelves may need swapping halfway.

Will it fit in your kitchen?

Measure your worktop space and the height under your wall cupboards before buying. Air fryers vent hot air out of the back or top, so manuals typically ask for a clear gap around the unit and not to use it directly under cupboards. Check the specific clearance in the manual of any model you're considering.

Also think about storage. Larger models are heavy and awkward to move in and out of a cupboard every day.

Tip: Mark out the footprint on your worktop with a tape measure or a sheet of paper first. Big air fryers look much bigger at home than on a shop shelf.

Power and running costs

Bigger air fryers usually have higher wattage. To compare running costs, multiply the power rating in kilowatts by how long you cook in hours and by your electricity unit rate. A large model running half empty uses more energy than a smaller one filled sensibly, so buying the size you'll actually fill makes sense.

If a model needs two or three batches for your household, the extra cooking time can cancel out the savings compared with using the oven once.

General information only. Check product labels and manufacturer instructions before you start.