Bird Cage Size Calculator
Calculate minimum cage dimensions for your bird species from parakeet to macaw.
Returns bar spacing, width, depth, and height in inches and cm.
Bird cage sizing is based on the bird’s physical size, wingspan, and natural movement patterns. The most important dimension is width — birds fly horizontally, not vertically, so a cage must be wide enough for the bird to spread its wings and move side to side without touching the bars.
Core sizing rule:
Minimum cage width ≥ 1.5× the bird's wingspan
Minimum cage length ≥ 2× the bird's wingspan (for short horizontal flights)
Bar spacing is equally critical — the wrong spacing can trap or injure a bird:
| Bird Size | Bar Spacing |
|---|---|
| Extra small (finches, canaries) | 3/8" – 1/2" (0.95–1.27 cm) |
| Small (budgies, parrotlets) | 1/2" – 5/8" (1.27–1.6 cm) |
| Medium (cockatiels, lovebirds) | 5/8" – 3/4" (1.6–1.9 cm) |
| Large (conures, caiques) | 3/4" – 1" (1.9–2.5 cm) |
| Extra large (Amazons, African Greys) | 3/4" – 1" (1.9–2.5 cm) |
| Giant (macaws, cockatoos) | 1" – 1.5" (2.5–3.8 cm) |
Recommended minimum cage dimensions by species:
| Species | Min Width × Depth × Height |
|---|---|
| Finch / canary | 18" × 18" × 24" (46×46×61 cm) |
| Budgerigar (parakeet) | 18" × 18" × 24" (46×46×61 cm) |
| Cockatiel | 24" × 18" × 24" (61×46×61 cm) |
| Lovebird | 24" × 24" × 24" (61×61×61 cm) |
| Conure (small) | 24" × 24" × 30" (61×61×76 cm) |
| Conure (large) | 36" × 24" × 48" (91×61×122 cm) |
| African Grey / Amazon | 36" × 24" × 48" (91×61×122 cm) |
| Cockatoo (medium) | 40" × 30" × 60" (102×76×152 cm) |
| Macaw (large) | 48" × 36" × 60" (122×91×152 cm) |
Multiple bird adjustment: Add 50% more floor space per additional bird of the same species. Two budgies need 1.5× the minimum — not 2× — because birds share perching space vertically.
Cage shape matters:
- Rectangular cages are best, birds feel more secure in corners and navigate straight paths naturally
- Round cages are discouraged, birds cannot find a safe corner and the curved bars can trap feet
- Tall cages are good but wide cages are more important for active, flying species
Enrichment note: The cage is just the starting point. Most medium and large parrots require 2–4 hours of supervised out-of-cage time per day for physical and psychological health.
How we build and check this calculator
This calculator runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
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