Cage size for two budgies
A practical reference to cage dimensions for two budgies, including what BCSA says about width and what other sources do not specify.
BCSA dimensions and pair guidance
BCSA Budgerigar Cages (Dec 2023) lists dimensions for one budgie: about 91 cm (36 in) wide, 76 cm (30 in) long and 46 cm (18 in) high. These measurements are a single-bird reference, not a complete set of pair dimensions.
For pairs, BCSA says to “Double the width to allow space for shared flight.” In practical terms, use about twice the listed one-bird width as the width reference for two budgies. BCSA does not give a separate pair figure for length or height in the cited guidance.
What other sources specify
The MSD table gives one minimum for the species group; it does not state a figure per bird. MSPCA-Angell does not address how the number of birds affects cage size. Those sources therefore do not provide a separate two-budgie dimension in the details cited here.
Budgies are flock birds and are commonly kept in pairs or groups (general knowledge). If you are unsure about housing birds together, ask an avian vet. For details beyond BCSA’s instruction to double the width, check with the relevant organiser or official source, since a pair-specific length and height are not stated here.