Log Reduction

Calculate the impact of a disinfectant technique

Calculator

CFU
CFU
%

Governing Equation

To calculate log reduction use the following formula:


LogReduction=log⁡10CFUinitialCFUfinalLog Reduction = \log_{10}{\frac{CFU_{initial}}{CFU_{final}}}
PercentReduction=CFUinitial−CFUfinalCFUinitialPercent Reduction = \frac{CFU_{initial}-CFU_{final}}{CFU_{initial}}
Log ReductionReduction
1 Log Reduction90%
2 Log Reduction99%
3 Log Reduction99.9%
4 Log Reduction99.99%
5 Log Reduction99.999%
6 Log Reduction99.9999%