Simplified version of the Dairy Science and Food Technology F and P value calculator.

This is a simplified version of the Dairy Science and Food Technology F and P value calculator. To use you must first generate a simple data input grid by selecting the time interval, in minutes, used for your temperature measurements e.g. 3 minutes and the total process time e.g. 120 minutes. Adjust the reference temperature and Z-value and add your temperature-values. The software will then calculate the equivalent lethality at the reference temperature and using the Trapezoid rule, the cumulative lethality for your process. Note a D-value is not required for F or P calculation.

The number of log reductions of a target microbial group or organism can also be calculated if the user has the appropriate D-value. Excel spread sheet F calculators, programmed using both Simpson's and the trapezoid rules are available for download.

Other On Line F calculators that are even easier to use are available as below:

• Calculator for determining the lethality (F, value) of a thermal process using the Trapezoid and Simpson's rules. This unique calculator works with thousands of pasted values e.g. from a data logger.
• Calculator for determining the lethality (F, B* values) and chemical changes (C* value, formation of: HMF, Lactulose, Furosine, and destruction of thiamine) in heated milk integrated using the Trapezoid and Simpson's rules.
• Calculator for determining the lethality (F, B* values) and chemical changes (C* value) for generic high temperature processes using the Trapezoid and Simpson's rules.