CCAI - Calculated Carbon Aromaticity Index

Loading calculator…

This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

CCAI = \rho_{15} - 81 - 141 \cdot \log_{10}(\log_{10}(\nu_{50} + 0.85))

Symbol	Meaning	Unit
$\rho_{15}$	Density at 15 °C	kg/m³
$\nu_{50}$	Viscosity at 50 °C	cSt
$CCAI$	Calculated Carbon Aromaticity Index

Source: ISO 8217 Annex D; Shell / ExxonMobil CCAI technical notes

Ignition-quality index for residual marine fuels.