Cattle Weight by Age: Growth Chart & Estimates

Cattle weight varies significantly by breed, nutrition, and management, but general benchmarks help producers track whether calves and growing cattle are on target. A beef calf typically weighs 70-90 lbs at birth, 400-500 lbs at weaning (6-7 months), and reaches a market finish weight of 1,250-1,400 lbs at 15-18 months in a feedlot setting.

Birth to weaning is the period of fastest relative growth. Calves gain 2.0-2.5 lbs per day on their mothers, reaching 450-550 lbs by 205 days of age. Adjusted 205-day weaning weight is a standard performance metric used to compare genetics. Calves gaining less than 1.8 lbs per day may indicate inadequate milk production or forage quality.

After weaning, stocker cattle on grass typically gain 1.5-2.0 lbs per day depending on forage quality. On high-quality pasture or winter wheat grazing, gains can reach 2.5 lbs per day. Backgrounding on hay and supplement yields 1.0-1.5 lbs per day, which is more economical per pound of gain but extends the time to market weight.

Feedlot cattle on a finishing ration of corn and distillers grains gain 3.0-4.0 lbs per day. A typical feeding period is 120-180 days, adding 400-600 lbs to reach a finish weight of 1,250-1,400 lbs. Feed conversion in the feedlot averages 6:1, meaning 6 lbs of dry matter intake produces 1 lb of gain.

Dairy breed calves follow different trajectories. Holstein bull calves weigh 80-100 lbs at birth and grow rapidly, reaching 500 lbs by 6 months and a fed weight of 1,350-1,500 lbs at 14-16 months. Holstein steers finish at heavier weights than beef breeds due to their larger frame size.

Estimated breed-specific mature cow weights include: Angus 1,100-1,300 lbs, Hereford 1,200-1,400 lbs, Simmental 1,300-1,500 lbs, Charolais 1,400-1,600 lbs, and Brahman 1,100-1,400 lbs. Mature bulls typically weigh 30-50% more than cows of the same breed.

To estimate live weight without a scale, measure heart girth (circumference just behind the front legs) in inches and use the formula: Weight = (Heart Girth x Heart Girth x Body Length) / 300, where body length is measured from the point of the shoulder to the pin bone. This formula is accurate within 3-5% for cattle in average body condition.