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Calculation Machine

Bird Cage Size Calculator

Minimum cage dimensions, bar spacing and perch count for your bird.

Reviewed by James Whitfield · How we check our maths

Your values

ⓘ Live results

Results
Verdict
Too small — see the minimums below
Minimum width
106 cm
Minimum depth
38 cm
Minimum height
63 cm
Recommended bar spacing
12-16 mm
Floor area
0.45 m2 (0.23 m2 per bird)
Perches needed
3 at varied diameters

Working

  1. 1min width = 25 cm x 3 x sqrt(2) = 106 cm

Quick answer

Minimum cage width should be at least three times the bird's wingspan, with bar spacing narrow enough that the head cannot pass through.

The formula

min width = wingspan x 3; volume = W x D x H

Worked example

Worked example

Using the values the calculator loads with.

Inputs

  • Wingspan25 cm
  • Number of birds2 birds
  • Cage width90 cm
  • Cage depth50 cm
  • Cage height100 cm

Result

  • VerdictToo small — see the minimums below
  • Minimum width106 cm
  • Minimum depth38 cm
  • Minimum height63 cm
  • Recommended bar spacing12-16 mm
  • Floor area0.45 m2 (0.23 m2 per bird)

How to use the Bird Cage Size Calculator

  1. 1Measure or look up the wingspan of your species, tip to tip with wings extended.
  2. 2Enter how many birds share the cage and the cage's internal dimensions.
  3. 3Check bar spacing carefully — a bird that can push its head through can strangle.

Frequently asked questions

Is height or width more important?

Width, by a long way. Birds fly horizontally, so a wide cage beats a tall narrow one of the same volume.

Does out-of-cage time change the minimum?

It helps enormously but does not replace the minimum. Even with daily free flight the cage must allow full wing extension and short hops.

About this calculator