Rennet Calculator and Optimal Dose for Milk

The Coagulation Calculator and Optimal Dose for Milk app is a technical tool that allows you to accurately calculate the ideal amount of rennet to use for each dairy processing, depending on the type of milk, coagulation temperature, and enzymatic strength.
It is useful for artisan dairies, analysis laboratories, and cheese producers to standardize coagulation times and optimize milk yield.


Main Features

  • Automatic calculation of the optimal rennet dose (ml).
  • Estimation of the average coagulation time (minutes).
  • Automatic adjustment for enzymatic strength (IMCU).
  • Qualitative assessment of the working temperature.
  • Support for liquid, paste, and powder rennet.

How It Works

  1. Enter the amount of milk (in liters).
  2. Select the type of milk and the type of rennet.
  3. Enter the enzymatic strength of the rennet (IMCU).
  4. Indicate the coagulation temperature (°C).
  5. The app automatically calculates:
    • the optimal rennet dose;
    • the estimated coagulation time;
    • a technical note and an operational comment.

Reference Tables

Type of MilkBase Dose (ml/L)Average Time (min)Temperature Range (°C)
Cow0.253032 – 38
Goat0.302530 – 36
Sheep0.352033 – 40
Type of RennetCorrectionTechnical Notes
Liquid1.00Universal for fresh and semi-hard cheeses
Paste0.85Aromatic, suitable for pecorino and aged cheeses
Powder0.90Used in industrial plants or large productions

Practical Example

  • Milk: 100 L (cow)
  • Rennet: liquid 180 IMCU
  • Temperature: 36 °C

Result:

  • Optimal dose: 13.9 ml
  • Estimated coagulation time: 30.0 minutes
    → Ideal temperature for regular enzymatic coagulation.

Benefits

  • Precise control of the rennet amount.
  • Better uniformity of setting times.
  • Prevention of excessive or insufficient coagulation.
  • A useful tool for technical training and HACCP.

FAQ – Frequently Asked Questions

1. How is the optimal dose calculated?
It is based on the average reference dose (ml/L) adjusted for the type of rennet and the enzymatic strength (IMCU).

2. Does the app take into account the type of cheese?
No, but you can modify the parameters in the code to adapt them to soft or hard cheeses.

3. Is the result expressed in ml or g?
In ml (for liquid rennet) or in grams equivalent for the solid/powder form.

4. Can I enter temperatures outside the standard range?
Yes, but the app will indicate any anomalies in the technical note.

5. Can it be used on a smartphone in the lab?
Yes, the layout is simple and fully responsive.

6. Is it possible to add pH or actual set time?
Yes, I can extend the app to include a real vs. theoretical comparison module.