Scientific, information & consultancy services for the food industry

Calculator for determining the Decimal Reduction Time (D) for a microorganism at a higher temperature knowing the D-value at a lower temperature and the Z-value.

Lower Temperature
e.g. (72°C)

D value (seconds) at Lower Temperature
Z value (°C)
Higher Temperature (°C)
Calculated D value at Higher Temperature (seconds)

NOTE! The science and mathematics behind this calculator are described in the modeling exercise to investigate the survival of Mycobacterium avium subsp. paratuberculosis following HTST treatment of milk.

How to cite this article

Mullan, W.M.A. (2010) [On-line] UK: Available: Accessed: