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Milk Yield Calculator

Work out milk yield instantly with clear inputs, formula shown and shareable results.

About Milk Yield Calculator

Multiplies daily yield by lactation length for per-cow output and scales it across the herd.

Formula

Lactation yield

Yield per lactation = daily yield x lactation days; herd yield = per cow yield x cows in milk

Worked example

With the default values below, Milk Yield Calculator returns Yield per cow per lactation of 7,625.0. Change any input above and every figure here is recalculated in your browser.

Inputs used

Daily yield per cowaccepts 0.5–80 L
25 L
Lactation lengthaccepts 30–500 days
305 days
Cows in milkaccepts 1–100,000
40

Results

Yield per cow per lactation
7,625.0 L
Herd yield per lactation
305,000 L
Herd yield per day
1,000.0 L
Yield per cow if milked all year
9,125.0 L

Step by step

  1. 1Values used
  2. 2Lactation yield
  3. 3Yield per cow per lactation= 7,625.0 L
  4. 4Herd yield per lactation= 305,000 L
  5. 5Herd yield per day= 1,000.0 L
  6. 6Yield per cow if milked all year= 9,125.0 L

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why is 305 days standard?

It leaves a 60-day dry period in a 365-day calving interval, and is the basis of official lactation records.

Does daily yield stay constant?

No. It peaks four to eight weeks after calving and then declines, so average daily yield is used here.

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