Land Carrying Capacity Calculator

Enter your ZIP code and acreage to find out how many animals your land can realistically support — adjusted for your region's rainfall, growing season, and forage productivity. Select individual animals or plan a mixed herd.

ZIP Code

Available Pasture Acres

Pasture Quality

Grazing Method

Hay / Feed Supplement

Season

Which animals are you considering?

Select one or more. For a mixed herd, enter how many of each you want — the calculator will tell you if your land can support the combination.

Your Land Can Support

Total Animal Units

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AUs available

AUs / Acre

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your region rate

Forage Production

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tons

dry matter/yr

Stocking Status

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Maximum Animals by Species (if running that species alone)

🔗 Related tools: Pasture Acreage Calculator · Rotational Grazing Planner · Livestock Feed Calculator

Animal Unit Equivalents Reference

Animal	AU Value	Animals per AU

Frequently Asked Questions

How many animals can I put on one acre?

It depends heavily on your location, rainfall, and pasture quality. In the humid Southeast, one acre of good pasture can support 1–2 animal units. In the arid West, the same acre might only support 0.2–0.5 animal units. One animal unit equals one 1,000 lb cow; a goat counts as roughly 0.15 animal units.

What is an animal unit?

An animal unit (AU) is a standardized measure equal to one 1,000 lb beef cow consuming about 26 lbs of dry matter per day. All other livestock are expressed as fractions: a goat is 0.15 AU, a sheep 0.20 AU, a horse 1.25 AU. This lets you compare and mix different species on the same land.

How does rainfall affect how many animals I can keep?

Rainfall is the single biggest factor in pasture productivity. Areas with 40+ inches of annual rainfall can grow 3–5 tons of dry forage per acre per year. Areas with under 15 inches might produce only 0.5–1 ton. Since each animal unit needs roughly 4–5 tons of forage per year, the difference between a wet and dry climate can change carrying capacity by 5–10×.