GIFSQ Tools · Module 07 — Dairy, Milk, Cheese & Fermented Products · Tool 124 of 500
Compare milk protein with milk fat as a ratio, and see the gap between the two in percentage points.
Try sample values — fills the form with the worked example below.
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Protein-to-fat ratio
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Protein minus fat (pp)
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Protein (%)
Equation: Protein-to-fat ratio = protein (%) ÷ fat (%). Protein minus fat (percentage points) = protein (%) − fat (%).
Method: Ratio of the two main milk solids: protein by ISO 8968-1 Kjeldahl (IDF 20-1) or ISO 9622 mid-infrared, fat by ISO 1211 Röse-Gottlieb or ISO 9622. The ratio is a routine herd and cheese-yield indicator.
Assumptions: protein and fat are measured on the same sample; true protein is used, not crude protein inflated by non-protein nitrogen.
Limitations: the ratio says nothing about absolute levels — a low ratio can come from high fat or low protein; cheese yield also depends on casein, not total protein.
Rounding: ratio and gap to 2 decimal places; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Method: Ratio of the two main milk solids: protein by ISO 8968-1 Kjeldahl (IDF 20-1) or ISO 9622 mid-infrared, fat by ISO 1211 Röse-Gottlieb or ISO 9622. The ratio is a routine herd and cheese-yield indicator.
Assumptions: protein and fat are measured on the same sample; true protein is used, not crude protein inflated by non-protein nitrogen.
Limitations: the ratio says nothing about absolute levels — a low ratio can come from high fat or low protein; cheese yield also depends on casein, not total protein.
Rounding: ratio and gap to 2 decimal places; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Worked example: Protein 3.3%, fat 3.8%. Ratio = 3.3 ÷ 3.8 = 0.87; protein minus fat = 3.3 − 3.8 = −0.50 percentage points.
Enter values above to see results.
Cow milk protein is typically 3.2–3.5% and fat 3.5–4.0%, giving a ratio near 0.85–1.00. Tool 124 of 500 — GIFSQ
