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Diesel Index Formula

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Diesel Index is defined as a measure of the ignition quality of a diesel fuel. Check FAQs

DI = °API \cdot (\frac{AP}{100})

DI - Diesel Index?°API - API Gravity?AP - Diesel Aniline Point?

Diesel Index Example

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With units

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Here is how the Diesel Index equation looks like with Values.

Here is how the Diesel Index equation looks like with Units.

Here is how the Diesel Index equation looks like.

109.47 = 41 \cdot (\frac{267}{100})

109.47 = 41 \cdot (\frac{267°F}{100})

109.47 = 41 \cdot (\frac{267}{100})

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Diesel Index Solution

Follow our step by step solution on how to calculate Diesel Index?

FIRST Step Consider the formula

DI = °API \cdot (\frac{AP}{100})

Next Step Substitute values of Variables

∴

DI = 41 \cdot (\frac{267°F}{100})

Next Step Prepare to Evaluate

∴

DI = 41 \cdot (\frac{267}{100})

LAST Step Evaluate

∴

DI = 109.47

Diesel Index Formula Elements

Variables

Diesel Index

Diesel Index is defined as a measure of the ignition quality of a diesel fuel.

Symbol: DI

Measurement: NAUnit: Unitless

Note: Value should be greater than 45.

Formulas to find Diesel Index

API Gravity

API gravity is defined as a measure of how heavy or light a petroleum liquid is compared to water.

Symbol: °API

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find API Gravity

Diesel Aniline Point

Diesel Aniline Point is defined as the lowest temperature at which equal volumes of aniline and diesel are completely miscible.

Symbol: AP

Measurement: TemperatureUnit: °F

Note: Value should be greater than -459.67.

Formulas to find Diesel Aniline Point

Other formulas in Basics of Petrochemicals category

Go API Gravity

°API = (\frac{141.5}{SG}) - 131.5

Go Aniline Point

AP = \frac{DI \cdot 100}{°API}

Go Saybolt Method Viscosity

v = (0.219 \cdot t) - (\frac{149.7}{t})

Go Viscosity Index Mixture

VI = (\frac{L - U}{L - H}) \cdot 100

How to Evaluate Diesel Index?

Diesel Index evaluator uses Diesel Index = API Gravity*(Diesel Aniline Point/100) to evaluate the Diesel Index, Diesel Index is a calculated value that is used to estimate the cetane number of a diesel fuel. Diesel Index is denoted by DI symbol.

How to evaluate Diesel Index using this online evaluator? To use this online evaluator for Diesel Index, enter API Gravity (°API) & Diesel Aniline Point (AP) and hit the calculate button.

FAQs on Diesel Index

What is the formula to find Diesel Index?

The formula of Diesel Index is expressed as Diesel Index = API Gravity*(Diesel Aniline Point/100). Here is an example- 109.47 = 41*(403.705555677414/100).

How to calculate Diesel Index?

With API Gravity (°API) & Diesel Aniline Point (AP) we can find Diesel Index using the formula - Diesel Index = API Gravity*(Diesel Aniline Point/100).

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