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Enter the number of milking cows, the average milk per cow per day, the forecast period in days and a loss allowance for milk withheld, spilled or otherwise unsaleable. The calculator gives daily milk, gross milk for the period, saleable milk after loss, and saleable milk per cow. Results are planning estimates, not a guarantee of production.
Daily milk equals milking cows multiplied by average milk per cow per day. Gross milk equals daily milk multiplied by days, and saleable milk equals gross milk after the loss allowance. Twenty cows averaging 25 litres per day for 30 days produce 500.00 litres per day, 15000.00 litres gross and 14625.00 litres saleable at 2.5 percent loss, which is 731.25 litres saleable per cow.
Average yield hides the lactation curve: cows peak about 6 weeks after calving and fall slowly after that, so a herd average taken at peak overstates the full lactation. Use a measured average from tank records for the same period, not a peak day figure. First lactation animals usually yield less than mature cows, and high yielding herds need the feed, water and health management to match.
Loss covers milk withheld for treatment, spilled milk, and milk that cannot be sold. A 2.5 percent allowance is a common planning figure, but treated cows or a disease outbreak can push it higher for a period. Use the saleable figure for tank capacity, pickup planning and short term revenue estimates, and compare it with actual shipped volume each month.
Ten cows averaging 30 litres per day for 10 days produce 300.00 litres per day, 3000.00 litres gross and, with no loss, 3000.00 litres saleable, which is 300.00 litres per cow. Feed quality, water access, heat, health, stage of lactation and genetics all move real yield away from a simple average, so treat this as a planning estimate and update it from farm records.
A typical dairy cow produces about 25 litres per day on average, with high yielding cows above 35 litres and lower yielding cows below 20 litres, depending on breed, feed and stage of lactation.
Multiply milking cows by average milk per cow per day and by days, then subtract a loss allowance. Twenty cows at 25 litres for 30 days give 14625.00 litres saleable at 2.5 percent loss.
Saleable milk is gross milk minus milk withheld, spilled or otherwise unsaleable. It is the figure to use for tank capacity and pickup planning.
It depends on cows and yield: 20 cows at 25 litres per day produce about 14625.00 litres saleable in 30 days at 2.5 percent loss.
Cows peak about 6 weeks after calving and yield falls slowly after that. Stage of lactation, feed, health and season all move the curve.
About 115 litres per day in planning figures, because milk is about 87 percent water and high yielding cows drink far more than dry cows.
No, this is a planning estimate from averages you enter. Real production changes with ration, weather, health, genetics and stage of lactation.
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