Milk Quality Calculators on DairyCalc – Dairy & Industrial Engineering Calculators

CLR Calculator

Wed, 01 Jan 2025 00:00:00 +0000

What is CLR (Corrected Lactometer Reading)?

The lactometer measures the density (specific gravity) of milk. However, the reading changes with temperature. CLR corrects the observed reading to the standard temperature of 27°C.

Temperature Correction Formula

CLR = OLR + [(Temperature − 27) × 0.2]

Where:

OLR = Observed Lactometer Reading at actual temperature
Temperature = Milk temperature in °C
27°C = Standard reference temperature

How to Use a Lactometer

Allow milk to reach room temperature (27°C ideally)
Spin the lactometer gently in the milk cylinder
Read the scale at the meniscus level
Note the temperature of the milk
Use this calculator to correct to 27°C

CLR Normal Range

Milk Type	Normal CLR Range
Cow Milk	26–32
Buffalo Milk	28–34
Mixed Milk	26–33

Values below 20 may indicate adulteration with water.

Cream Separation Calculator

Wed, 01 Jan 2025 00:00:00 +0000

Cream Separation in Dairies

Centrifugal cream separators are used to separate whole milk into skim milk (low fat) and cream (high fat). Since fat has a lower density than the surrounding serum, the centrifugal force pushes skim milk outward and forces fat globules toward the center.

Separation Yield Formula

The yield is calculated using mass balance (Pearson Square principles):

Cream Quantity (kg) = Milk Quantity × (Milk Fat − Skim Fat) ÷ (Cream Fat − Skim Fat)

Milk Density Calculator

Wed, 01 Jan 2025 00:00:00 +0000

What is Milk Density?

Milk density or specific gravity is a measure of the mass of milk compared to water. It is a critical parameter in the dairy industry used to detect water addition (adulteration) and to convert volume (liters) into weight (kilograms).

Average specific gravity of cow milk ranges from 1.028 to 1.030 g/mL, and buffalo milk ranges from 1.030 to 1.032 g/mL at 27°C.

Specific Gravity Formula

Specific Gravity = (CLR ÷ 1000) + 1

Milk Fat Calculator

Wed, 01 Jan 2025 00:00:00 +0000

What is Milk Fat?

Milk fat is one of the most important quality parameters in dairy processing. It refers to the total fat content in milk, expressed as a percentage by weight.

In India, milk is priced based on fat and SNF content. Accurate fat measurement and calculation is essential for:

Milk procurement: Pricing farmers correctly based on fat content
Standardization: Adjusting fat to required levels for products
Product formulation: Making butter, cream, cheese, and ghee
Quality compliance: Meeting FSSAI and BIS standards

How to Use This Calculator

Enter the total milk weight in kilograms
Enter the fat percentage of the milk
Click Calculate
The calculator will show you the total fat weight in the milk

Formula

The formula to calculate milk fat weight is straightforward:

Milk Protein Calculator

Wed, 01 Jan 2025 00:00:00 +0000

What is Milk Protein?

Milk protein consists of caseins (~80%) and whey proteins (~20%). It is a vital nutritional component and determines the yield of cheese, paneer, and milk powders.

While accurate measurement requires laboratory testing (like Kjeldahl nitrogen titration or FTIR analyzers), protein content has a stable mathematical correlation with Solids-Not-Fat (SNF).

Estimation Formula

In standard cow and buffalo milk, protein constitutes approximately 36% to 38% of the SNF:

Milk Standardization Calculator

Wed, 01 Jan 2025 00:00:00 +0000

What is Milk Standardization?

Milk standardization is the process of adjusting the fat content of milk to a desired target level by adding either:

Skim milk (fat ~0.05%) to reduce fat content
Cream (fat 30–40%) to increase fat content

This is a mandatory step in producing legal milk types under FSSAI regulations.

Pearson’s Square Method

The calculator uses Pearson’s Square — an industry-standard mixing calculation:

Adjuster Quantity (kg) = Milk Quantity × |Current Fat − Target Fat| / |Target Fat − Adjuster Fat|

SNF Calculator

Wed, 01 Jan 2025 00:00:00 +0000

What is SNF (Solids-Not-Fat)?

SNF (Solids-Not-Fat) refers to all the solid components in milk except fat. This includes:

Lactose (~4.7%)
Proteins (~3.4%)
Minerals (~0.7%)
Vitamins (~0.1%)

SNF is a critical parameter for milk quality and pricing. Higher SNF indicates richer milk with more nutritional value.

Richmond’s Formula

The most widely used formula for calculating SNF is Richmond’s formula:

SNF (%) = (CLR ÷ 4) + (0.21 × Fat %) + 0.36