Ask anyone who regrets their air fryer purchase and the problem is almost never the cooking — it's the size. Buy too small and you end up making a family dinner in shifts, with the chips going cold while the schnitzel finishes. Buy too big and you've surrendered half the bench to a machine that spends most of its life reheating a single serve of leftovers.
Litre ratings make the decision harder than it should be, because a 10L basket and a 10L slice of oven cavity hold very different amounts of food. This guide covers what each size realistically feeds, which format suits your kitchen, what the power draw and footprint actually mean for your bench, and what you'll be washing up afterwards — with picks from a 2.5L solo unit to a 45L family oven.
How to choose the right size air fryer
Match capacity to your household
A useful working rule is 1.5 to 2 litres of basket capacity per person you regularly cook for. In practice, that shakes out like this:
- 2–3L: one person. Fits around 500g of chips, a couple of chicken breasts or a plate's worth of reheated leftovers. Also the right size for caravans, studio apartments and office kitchenettes.
- 4–6L: couples. Handles a tray of roast vegetables or four sausages in one go, though a whole chicken is a squeeze.
- 7–11L: three to five people. This is where single large baskets, dual drawers and stacked designs all compete, and it's the sweet spot for most Australian families.
- 20L and up (oven-style): five or more people, batch cookers, and anyone who wants to roast a whole chook while vegetables cook on a second rack.
If you're between two sizes, go up. An oversized basket cooks a small meal perfectly well; an undersized one can't do the reverse, and overcrowding is the number one cause of soggy, steamed-instead-of-crisped food.
Basket, oven or dual-drawer?
Basket air fryers are the classic pull-out drawer design. They preheat fast, make it easy to shake food halfway through, and take up the least bench space per litre. The limitation is one temperature and one timer — everything in the drawer cooks the same way.
Air fryer ovens have a door and racks instead of a drawer. You can cook on multiple levels at once, fit flat items like a pizza or a whole tray of party pies, and roast larger cuts. They take longer to preheat and checking food means opening the door, but for volume cooking nothing else comes close.
Dual-drawer and stacked models run two zones at different temperatures and times, usually with a sync function so both finish together. That solves the classic problem of chips needing 200 degrees while the fish wants 180. You pay for the convenience in either bench width (side-by-side drawers) or height (stacked designs).
Wattage, power points and bench space
Most benchtop air fryers draw somewhere between 1,400W and 2,400W, which a standard Australian 10-amp power point handles fine. The catch is what else shares the circuit: run a large air fryer and a kettle off the same double outlet and you may trip the breaker mid-cook. Big oven-style units are worth giving their own outlet.
On space, litres climb faster than footprint — an 11L stacked unit can occupy less bench length than a 5L basket — but oven styles need extra room you might not count: clearance for the door to swing open, and air space around the back and sides because the exhaust runs hot. Measure your bench depth and the height under your overhead cupboards before falling for a 45L unit, and leave roughly 10cm of breathing room around whatever you buy.
The cleaning reality
A single-basket machine is the easiest to live with: one non-stick basket and a crisper plate, washed in a minute while it's still warm. Dual-drawer models double the parts but they're the same quick job twice. Oven styles trade drawer-scrubbing for oven-cleaning — racks and trays are flat and fit a sink or dishwasher easily, but the interior walls collect fat spatter and need a proper wipe-down the way a regular oven does. Whichever format you choose, cleaning while the unit is still warm beats chiselling baked-on fat off a cold basket every time.
The picks: best air fryers by household size
Best for one: Devanti Air Fryer 2.5L
The Devanti Air Fryer 2.5L is $57.98, down from $77.99 — a saving of $20. Simple knob controls mean there's nothing to learn: twist the temperature, twist the timer, done. It suits singles, students, caravan travellers and anyone who mostly cooks for one, and it's small enough to live in a cupboard between uses rather than claiming permanent bench space.
Best single basket for families: Kogan XXL 10L Digital Air Fryer
The Kogan XXL 10L Digital Air Fryer is $121.60, reduced from $195.62 — about $45 off. One very large basket rather than two zones, which suits households that usually cook one big thing at a time: a kilo of chips, a full tray of wings, dinner for four in a single batch. If your family eats together and eats the same thing, this is the simplest way to get family-sized capacity without moving to an oven format.
Best for narrow benches: Kogan 11L Double Stack Air Fryer
The Kogan 11L Double Stack Air Fryer is $209.74, down from $235.12 — a saving of around $54. Its two drawers sit one above the other, so you get dual-zone cooking in roughly the bench width of a single-basket machine. It's the pick for galley kitchens, apartments and rentals where bench length is the scarce resource but you still want the main and the sides finishing at the same moment.
Best dual-zone flexibility: Ninja XXXL FlexDrawer AF500ANZ
The Ninja XXXL FlexDrawer Air Fryer AF500ANZ (currently out of stock) is $215.99, down from $533.38 — a saving of over $150. The 10.4L drawer works as two independent zones or, with the divider out, one long mega-zone that swallows food a normal basket can't, like a whole side of salmon. It suits families whose cooking swings between weeknight two-zone dinners and weekend entertaining, and it's the most versatile drawer-style machine here.
Best oven-style all-rounder: Kogan 30L Digital Air Fryer Oven
The Kogan 30L Digital Air Fryer Oven is $238.62, was $310.21 — about $310.21 off. Rack-based cooking means multiple trays going at once: dinner on one level, roast vegetables on another. It suits households of four or more, batch cookers who meal-prep on Sundays, and anyone who wants a second oven at Christmas without the cost of one.
Biggest capacity: Kogan XXXXL 45L Digital Air Fryer Oven
The Kogan XXXXL 45L Digital Air Fryer Oven is $364.78, down from $409.01 — close to $95 off. At 45 litres this is effectively a second oven that happens to air fry, sized for big households, entertainers and anyone routinely cooking whole roasts with all the trimmings. Just do the bench audit first: check your depth, door clearance and cupboard height before it arrives, not after.
Quick comparison
| Air fryer | Best for | Price |
|---|---|---|
| Devanti 2.5L | Singles, caravans, small kitchens | $57.98 |
| Kogan XXL 10L Digital | Families cooking one big batch | $150.48 |
| Kogan 11L Double Stack | Dual-zone cooking on narrow benches | $180.86 |
| Ninja XXXL FlexDrawer AF500ANZ | Two zones or one large zone, flexible families | $380.99 |
| Kogan 30L Air Fryer Oven | Multi-rack batch cooking, four-plus households | $238.62 |
| Kogan XXXXL 45L Air Fryer Oven | Big households, whole roasts, entertaining | $314.62 |
Air fryer size FAQ
What size air fryer do I need for a family of four?
Aim for 8–11L in a basket or dual-drawer format — enough to cook mains and sides for four in one round. If you batch cook or often roast whole chickens, a 20L-plus oven style is the better fit, since racks let you cook several trays simultaneously.
Are oven litres and basket litres the same thing?
No. Oven litres measure the whole cavity, including the air space around the racks, while basket litres describe the drawer you actually fill. A 30L oven doesn't hold three times the food of a 10L basket — it's more like double the usable cooking area, spread across levels. Compare within a format, not across formats.
Do bigger air fryers cost more to run?
Larger units draw more watts, but any air fryer is still cheaper to run per meal than heating a full-size wall oven, because the cavity is smaller and preheat times are shorter. The real waste is repeatedly running a 45L oven for a single serve of nuggets — size the machine to the meals you actually cook most nights.
Can an air fryer oven replace my regular oven?
For day-to-day cooking, largely yes — a 30L or 45L unit handles roasts, bakes and trays of vegetables. Where it falls short is very large bakeware and cooking for a crowd across four or more trays at once, so most people run one alongside the main oven rather than instead of it.
Get the size right the first time
Count the people you cook for, measure the bench, and pick the format that matches how you actually eat — one big batch, two zones, or multi-rack volume. You can compare every size above, from 2.5L to 45L, in our full air fryer range, dispatched from Sydney with 30-day returns and a 1-year warranty.
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Prices correct at publication and may change. Stock levels update daily.