Enter the time (minutes) and the temperature (C) into the Calculator. The calculator will evaluate the Pasteurisation Units. 

Pasteurisation Units Formula

PU = t *1.393^{(T-60)}


  • PU is the Pasteurisation Units (units)
  • t is the time (minutes)
  • T is the temperature (C)

To calculate Pasteurisation Units, multiply the time in minutes by 1.393 raised to the power of the temperature minus 60.

How to Calculate Pasteurisation Units?

The following steps outline how to calculate the Pasteurisation Units.

  • First, determine the time (minutes). 
  • Next, determine the temperature (C). 
  • Next, gather the formula from above = PU = t *1.393^(T-60).
  • Finally, calculate the Pasteurisation Units.
  • After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

time (minutes) = 2

temperature (C) = 60

FAQs on Pasteurisation Units

What are Pasteurisation Units?

Pasteurisation Units (PUs) are a measure of the effectiveness of the pasteurisation process, which is used to reduce the number of viable pathogens in food and beverages. The calculation of PUs helps in ensuring that the pasteurisation process has been sufficient to make the product safe for consumption without adversely affecting its quality.

Why is the temperature subtracted by 60 in the formula?

The subtraction of 60 from the temperature in the formula is based on the reference temperature for pasteurisation processes, which is typically around 60°C. This adjustment allows the formula to calculate the effectiveness of pasteurisation at temperatures above this baseline, as the effectiveness increases with higher temperatures.

Can the Pasteurisation Units formula be used for any type of food or beverage?

While the Pasteurisation Units formula provides a general guideline for assessing the effectiveness of pasteurisation, different foods and beverages may require specific considerations based on their composition, pH, and other factors. It is important to consult relevant food safety guidelines and regulations for specific products.

How does time affect the calculation of Pasteurisation Units?

Time is a critical factor in the calculation of Pasteurisation Units because it determines the duration of exposure to a specific temperature. Longer exposure times at a given temperature will result in higher Pasteurisation Units, indicating a more effective pasteurisation process. This relationship allows for adjustments in processing times and temperatures to achieve the desired level of pathogen reduction.