The calculator multiplies your flock size by a simple planning allowance for indoor housing, secure run space, feeders and water points. It covers small domestic flocks of ducks, chickens, geese and quail. The figures are deliberately practical estimates for early planning, not a claim that a setup is legally compliant or welfare-perfect in every situation.
Outdoor birds need more than square metres. A good setup also includes dry shelter, ventilation without drafts, shade, predator protection, clean bedding, suitable flooring, enrichment, easy cleaning, and enough feed and water access for lower-ranking birds. For ducks and geese, water access is especially important because they need to clean their heads and nostrils.