Standard Grade Coal - Heat Values

Approximate Lower Heating values of standard grades of coal. Provides heating values in both Btu/lb and kJ/kg for different coal grades including Anthracite, Bituminous, Sub-bituminous, and Lignite coal types.

Coal GradeHeating Value (Btu/lb)Heating Value (kJ/kg)
Anthracite1291030080
Semi-Anthracite1377032084
Low-volatile bituminous1434033412
Medium-volatile bituminous1384032247
High-volatile bituminous A1309030499
High-volatile bituminous B1213028262
High-volatile bituminous C1075025047
Sub-bituminous B915021319
Sub-bituminous C894020830
Lignite690016077

Coal Grade Descriptions

Anthracite Coal is very shiny, hard black coal, high carbon content and energy density, repels moisture, for domestic industrial uses, including smokeless fuel

Bituminous Coal is softer and shiny, moisture content is 8-20%, possible for coking coals, volatile matter from 16%-40%, can be used for thermal or metallurgical applications

Sub-bituminous Coal is soft and black with energy density lower than bituminous coal, most common type for electricity generation

Lignite Coal is light brown with high moisture content and low energy density, used mainly for electricity generation

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