Free Animal Housing Area calculator with clear step-by-step results.
Sizes an animal shed from stocking density. Head count multiplied by the space allowance per animal gives usable pen area; a service allowance is added for feed alleys, gates and bedding storage; and dividing by your intended building width returns the length you need to frame.
Pen area
Pen area = animals x space allowance per animal
Building length
Length = (pen area x (1 + service allowance)) / building width
Minimum space allowances for farmed animals are set by law in most jurisdictions and differ by species, weight and flooring type. Check the applicable welfare regulations before building.
It depends entirely on species, weight and system - roughly 0.1 m2 for a laying hen, 1.5 m2 for a growing pig on slats and 3-4 m2 for a bedded dairy cow. Use your local welfare code figure.
No. It covers the alleys and passages inside the shed footprint. External slurry stores, silage pads and yards are sized separately.