Minimum Cage
24×20×24"
Recommended
36×30×36"
Bar Spacing
0.5–0.625"
Cage size scales with √(bird count) per dimension
Minimum Cage Size
24 × 20 × 24"
(L × W × H) for 1 Cockatiels
Recommended
36×30×36"
Bar Spacing
0.5–0.625"
4
Perches
4
Toys
2
Food Bowls
1
Water Dishes
Width Over Height
Birds fly horizontally. Cage width matters more than height for most species.
Avoid Round Cages
Rectangular cages provide corners where birds feel secure and more usable space.
Vary Perch Types
Mix natural wood, rope, and platform perches at different heights for healthy feet.
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Result
A single cockatiel needs a minimum cage of 24×20×24 inches. The recommended 36×30×36 inch cage provides 1.5x the space in each dimension for comfortable living.
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Result
Two budgies need a cage scaled by √2 (1.41x) in each dimension. The minimum 25×25×34" gives each bird adequate space. Bar spacing must be exactly 0.5" to prevent escape.
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Result
African Greys are large parrots needing a minimum 36×24×48" cage with 0.75–1.0" bar spacing. The recommended 54×36×72" size gives ample room for climbing and wing stretching.
A single cockatiel needs a minimum cage size of 24×20×24 inches (L×W×H). The recommended size is 36×30×36 inches, which gives 1.5 times the minimum in each dimension. Bar spacing should be 1/2 to 5/8 inch to prevent escape or injury.
| Birds | Minimum Size | Recommended Size | Volume |
|---|---|---|---|
| 1 Cockatiel | 24×20×24" | 36×30×36" | 11,520 cu in |
| 2 Cockatiels | 34×28×34" | 51×42×51" | 32,368 cu in |
| 4 Cockatiels | 48×40×48" | 72×60×72" | 92,160 cu in |
Cage dimensions scale by the square root of the bird count. For 2 birds, each dimension is multiplied by √2 (about 1.41). For 4 birds, dimensions double. This accounts for the fact that doubling linear dimensions quadruples floor space, giving each bird adequate room.
| Bird Count | Scale Factor | Budgie Min Size | Cockatiel Min Size |
|---|---|---|---|
| 1 Bird | 1.00x | 18×18×24" | 24×20×24" |
| 2 Birds | 1.41x | 25×25×34" | 34×28×34" |
| 4 Birds | 2.00x | 36×36×48" | 48×40×48" |
Finches and canaries need 1/4 to 1/2 inch bar spacing, while budgies need exactly 1/2 inch. Bar spacing that is too wide lets small birds squeeze through or get their heads stuck, which can be fatal. Too narrow spacing restricts airflow and visibility.
| Bird Group | Species | Bar Spacing Range |
|---|---|---|
| Tiny | Finches, Canaries | 0.25–0.5" |
| Small | Budgies, Lovebirds | 0.5" |
| Medium | Cockatiels, Small Conures | 0.5–0.75" |
| Large | African Grey, Amazons | 0.75–1.0" |
| Extra Large | Large Macaws, Cockatoos | 1.0–1.5" |
Most pet birds fly horizontally, not vertically. A wide cage allows short flights and wing stretching, which is essential for exercise and joint health. Height is useful for climbing species like cockatoos, but a tall narrow cage restricts natural flight movement.
The number depends on species size and bird count. Small birds like finches need 3 perches and 3 toys minimum. Medium birds like cockatiels need 4 perches and 4 toys. Large birds like macaws need 6 perches and 6 toys. Add 0.5 perches and 0.5 toys per additional bird.
| Bird Size | Perches | Toys | Food Bowls | Water Dishes |
|---|---|---|---|---|
| Tiny (Finch) | 3 | 3 | 2 | 1 |
| Small (Budgie) | 4 | 4 | 2 | 1 |
| Large (African Grey) | 5 | 5 | 2 | 1 |
| XL (Macaw) | 6 | 6 | 2 | 1 |
Rectangular cages are strongly recommended over round cages. Round cages lack corners where birds feel secure, reduce usable perching space, and can cause behavioral issues like pacing. Rectangular cages maximize floor area and allow natural horizontal flight paths.
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Last Updated: Mar 9, 2026
This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.