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Stocking Rate Calculator

The season-long balance between what your ground grows and what your herd eats — with your local yield, not a made-up national one.

Season-long balance check

Framework: forage supply ÷ animal demand, per Univ. of Kentucky grazing math; AU convention (1,000-lb cow, often with calf) per NRCS usage. Yield input is deliberately yours — no national default exists honestly. Reviewed July 2026

Why this page won't give you a universal "cows per acre"

Because there isn't one. An acre of managed Kentucky fescue and an acre of western range differ by a factor of twenty in what they grow. Any site that answers "how many cows per acre" with one number is guessing with confidence. What is universal is the balance: (acres × season yield × utilization × (1 − reserve)) ÷ (animal weight × intake × days) = head the land can carry that season. Get the yield number from your county extension office or NRCS ecological site description — it's the one input worth a phone call.

Animal units, if you need to talk that language: an AU is conventionally a 1,000-lb cow (typically with a young calf). A 1,200-lb pair is about 1.2 AU; a 1,400-lb bull about 1.4; a 700-lb yearling about 0.7 — scale by weight and stage rather than memorizing tables.

Worked example: 40 acres × 6,000 lb DM × 47.5% × 85% (15% reserve) = 96,900 lb usable. A 1,200-lb lactating pair at 3% eats 36 lb/day × 210 days = 7,560 lb. 96,900 ÷ 7,560 ≈ 12–13 pairs for the season — on that yield. On 2,000 lb/acre ground the same math says 4.

Stock lighter than the math: the calculator's answer assumes average rainfall and even grazing. The 15% reserve default is the cheapest drought insurance you'll ever buy.