Work out dairy milk yield per cow instantly with clear inputs, formula shown and shareable results.
Per-cow daily yield is total milk divided by cows in milk and days, the basic productivity measure for a dairy. Multiplying by a standard 305-day lactation projects lactation yield, which allows comparison between herds with different calving patterns.
Milk yield
Yield per cow per day = total milk / (cows in milk x days)
Lactation projection
Projected lactation = yield per cow per day x lactation length
Not for this measure — divide by cows in milk. Track milk per total cow separately, as it captures whether too many animals are dry.
It reflects a 12-13 month calving interval with a two-month dry period, and is the international convention for comparing lactation records.