This calculator computes diesel soot density from smoke opacity. The algorithm is explained in the Smoke Opacity paper, Eq.(3) - Eq.(8) [subscriber access]. A discussion on the applicability and limitations of this calculation is included in the paper.

Enter the required input data and press “Calculate” button to do the calculation. An asterisk will appear if your data is out of range.

Input Data

Smoke opacity %
Light path length cm
Temperature °C

Results

Light extinction coefficient (K) 1/cm
Soot Density mg/m3
Soot Density @STP mg/Nm3
Mass fraction of soot mg/kg