What Size Bird Cage for 2 Parakeets? Minimums and Tips

Quick answer: What size bird cage for 2 parakeets? Aim for at least 30 inches long, with bars no more than 1/2 inch apart. A vet-written PetMD care sheet lists 30 x 18 x 18 inches for two budgies, and a vet-reviewed Chewy guide says 30 x 24 x 24 inches for two or more. Those numbers are floors.

In US pet stores, “parakeet” usually means a budgerigar, or budgie, and the guides below use the names interchangeably.

One honest caveat. When I went looking, I couldn’t find a veterinary body that publishes an official pair-specific number, so the figures below come from vet-written and vet-reviewed care guides, checked against the Merck Veterinary Manual’s general minimum for budgie-sized birds.

Parakeet Cage Size Chart

Source	Number of birds	Minimum size (L x W x H)	Bar spacing
Merck Veterinary Manual	Budgie-sized birds (budgie, cockatiel, lovebird, parrotlet)	20 x 20 x 30 in	0.5 in
PetMD (written by a DVM)	1 budgie	18 x 18 x 18 in	1/2 in or less
PetMD	2 budgies	30 x 18 x 18 in	1/2 in or less
PetMD	3 or more	32 x 18 x 20 in	1/2 in or less
Chewy (DVM-reviewed)	1 parakeet	18 x 18 x 18 in	about 1/2 in
Chewy (DVM-reviewed)	2 or more	30 x 24 x 24 in	about 1/2 in

Notice that the Merck figure is taller than the pet-care guides. My take for a pair: look for a cage at least 30 inches long that also clears Merck’s 20 inches of depth and 30 inches of height. That way you’re above every number in the table.

A quick checklist for a two-budgie cage:

at least 30 inches long, ideally more
at least 20 inches deep and 30 inches tall, to match Merck’s minimum
bars 1/2 inch apart or closer, evenly spaced
horizontal bars for climbing, and not a round cage
room for several perches of different sizes

What Size Bird Cage for 2 Parakeets Really Means

The length matters most. Chewy’s guide says width and length matter more than height, and asks for enough room for short flights.

The Massachusetts SPCA gives a test that works for any number of birds. The cage should be at least 1.5 to 2 times the bird’s wingspan in every direction, and with both wings spread, the wings and tail shouldn’t touch any bars. Each bird should also be able to turn on a perch without its tail hitting the sides.

With two birds, picture both doing that at once. That’s why the pair numbers jump in length.

Bar Spacing: The Number That Prevents Injuries

Bars should be 1/2 inch apart or closer. Merck, PetMD and Chewy all land on the same figure for budgies.

Chewy adds a reason: consistent spacing keeps a bird from getting its head stuck or escaping. The MSPCA’s quick check is to hold up a finger about as thick as the bird’s wing. If it fits between the bars, the spacing is too wide.

Don’t buy a cage built for larger parrots. Its bars are spaced for bigger heads.

What Changes the Number

More Than Two Birds

PetMD steps up to 32 x 18 x 20 inches for three or more. In practice, I’d add length first, since that’s where flight happens.

Time Out of the Cage

The MSPCA says companion birds need at least half an hour to an hour of interaction, such as training or play. Merck notes that keeping birds in small cages with little chance to exercise has physical and psychological consequences. My view: the less time your pair spends out, the more every inch of cage counts.

What Goes Inside

Perches, toys and bowls all eat into space. Merck says the cage should fit multiple perches of different sizes and textures. PetMD suggests perches at least 4 inches long and 3/8 inch thick, kept away from spots above food and water bowls.

Cage Shape

Chewy advises against round cages. Bar spacing can narrow where the bars meet, which can trap a bird’s feet. Chewy’s preference is horizontal bars the birds can climb.

Where to Put the Cage

Chewy suggests a bright room, the cage at about eye level, along a wall or in a corner, away from direct sun, drafts and heating or cooling vents.

Keep it out of the kitchen. PetMD warns that heated non-stick cookware releases an odorless, colorless gas that’s toxic to birds, and Chewy says those fumes can be fatal. Don’t use air fresheners near the cage either.

Keeping a Pair Healthy

PetMD recommends daily spot-cleaning and fresh bowls, and changing the cage lining at least weekly, more often with more than one bird. The MSPCA also says to cover any wire mesh floor with paper or another solid surface, since bare wire can hurt feet.

Book a yearly exam with an avian or exotic-animal vet, as PetMD advises. See a vet sooner for any of these signs, which PetMD lists as warnings: watery or discolored droppings, sneezing or open-mouth breathing, tail bobbing, weakness or loss of balance, or swellings and bleeding. Don’t wait it out.

Keeping other small pets too? Our guide to keeping a hamster cage from smelling covers bedding and cleaning, and there’s more in Small Pets & Birds.

Frequently Asked Questions

Can 2 Parakeets Live in an 18 Inch Cage?

Not by the guides above. PetMD and Chewy list 18 x 18 x 18 inches as the minimum for one parakeet. For two, they list at least 30 inches long.

What Is the Best Bar Spacing for Parakeets?

No more than 1/2 inch. Merck lists 0.5 inches for budgerigars, and PetMD says 1/2 inch apart or closer.

Is a Tall Cage Good for Budgies?

Height alone doesn’t help much. Chewy says width and length matter more, since budgies need room for short flights. Merck’s minimum still calls for 30 inches of height.

Do Parakeets Need to Be Kept in Pairs?

PetMD describes budgies as flock birds that enjoy other birds, and says a solo budgie needs more attention from you. If you keep a pair, size the cage for two.

How Often Should I Clean a Parakeet Cage?

PetMD suggests daily spot-cleaning and fresh food and water bowls, plus changing the cage lining at least weekly, and more often for two or more birds.

Last updated: November 10, 2026. Sources: Merck Veterinary Manual: cage size and bar spacing table, PetMD: budgie care sheet, Chewy: parakeet cage setup and MSPCA: suggestions for housing birds.