Pets
How big should a bird cage or aviary be?
Minimum floor area, suggested cage size, perch length and seed kg per month from bird species and count.
Quick answer
Pet birds need width to fly, not just height for a swing. Hobby targets scale by species: a pair of budgies wants a long flight cage more than a tall tower; cockatiels need still more floor. Perches should offer varied diameters — roughly 15–25 cm of usable perch length per bird is a starting point, plus toys that do not block flight paths.
Min floor area
2,400 cm²
- Suggested cage (L×W×H)
- 85 × 56 × 45 cm
- Cage volume
- 214 L
- Perch length
- 0.4 m
- Seed / month
- ~0.5 kg
Related animals tools Chicken coop size
Hobby targets prioritize flight width over tall towers. Floor ≈ birds × cm²/species; suggested size scales the base cage with √birds on length/width. Perch ≈ birds × cm/species. Seed is a mixed-seed ballpark — add fresh veg and weigh leftovers. Not veterinary advice; larger flight cages are kinder.
How it works
Enter species and bird count for a practical minimum floor area, a suggested L×W×H, perch length and seed kg/month. Tiny “starter” cages often fail the flight test. Not veterinary advice — larger is kinder whenever you can.
Shopping checklist after you know the dimensions: a large bird cage flight with horizontal bars for climbing, natural wood bird perches in two diameters (avoids foot strain), bird seed mix budgie sized to your species count, and a bird cage feeder drinker pair that does not block the flight path. Measure the spot on the floor before you buy — a cage that fits the calc but not the doorway is a common regret.
Check one measurement the dimensions above do not cover: bar spacing. A cage the right size with bars too wide lets a small bird push its head through and get stuck — budgies want roughly 1 cm, cockatiels about 1.5-2 cm. And one thing that belongs in any bird page even though it has nothing to do with the cage: overheated non-stick cookware releases fumes that kill birds within minutes, so the kitchen is the one room a cage should never be in. It is the most common accidental death in pet birds and almost nobody is told about it.
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Frequently asked questions
Budgie cage size for two birds?+
Aim for a long cage — often cited around 80–100 cm width for a pair — so they can hop and short-fly. Height alone does not replace a flight path.
Cage or outdoor aviary?+
An outdoor aviary gives more flight if predator-proof, shaded and draft-safe. Indoor flight cages still need daily out-of-cage time for many species.
How much seed do birds eat?+
Rough ballparks: budgie ~5–10 g/day, canary a bit less, cockatiel ~10–20 g/day — plus fresh veg. The tool scales by count; weigh leftovers and adjust.
Can different species share a cage?+
Often no — aggression and diet differ. When in doubt, separate housing. Ask an avian vet before mixing.
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