Thermal Death Time D-Value & z-Value Calculator

Determine microbial inactivation rates, decimal reduction time ($D$-value), thermal resistance constant ($z$-value), and target spore survival probabilities.

Target Microorganism & Thermal Properties

Microbial Preset:

Ref Temp T_ref (°C):

Ref D-Value (min):

z-Value (°C):

Process Temp T (°C):

Exposure Time t (minutes):

Initial Bioburden N0 (CFU or spores):

Kinetic Inactivation Results

Adjusted D-Value (D_T)

Log Reductions (S)

Rate Constant k

Surviving Population (N)

Inactivation Summary

Recommended Tools & Equipment

Tested hardware and components for high reliability

100% Free Tool Zero Sign-Up

Thermal Death Time D-Value & z-Value Calculator

Target Microorganism & Thermal Properties

Kinetic Inactivation Results

Frequently Asked Questions