Cattle Stocking Rate Calculator

Estimate carrying capacity from grazable acres, forage production, utilization, grazing period, and animal-unit equivalent.

Forage-Based Stocking Estimate

Grazable Acres

Use grazable pasture acres, not total deeded acres.

Animal Class

AUE adjusts forage demand for animal size and class.

Forage Starting Point

Average native pasture with mixed grass and brush pressure.

Annual Forage Production

lb DM/ac

Utilization Target: 25%

15%50%

Drought Reserve: 15%

0%40%

Grazing Period

months

Planned Herd Check

head

Management Check

Conservative native-range planning commonly starts near 25% consumed forage.

Enter acreage to check a planned herd.

1. Forage Supply

Grazable acres multiplied by annual dry-matter forage production.

2. Usable Forage

Supply adjusted by the utilization target and extra drought reserve.

3. Animal Demand

One animal unit is modeled as 26 lb of dry matter per day, or 780 lb per AUM.

Why the Estimate Changed

County averages are too blunt for a stocking decision. Two ranches in the same county can have different forage production because of soil depth, rainfall, brush, water distribution, grazing history, fertility, and wildlife pressure.

This calculator uses the standard forage supply and animal-unit demand approach:(acres x lb DM/ac x utilization% x drought reserve factor) / 780 lb AUM / (animal unit equivalent x grazing months)

Treat the result as a starting point. Before buying or adding cattle, verify forage production and stocking pressure with local Extension, NRCS, and on-ranch monitoring.

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