### Which one is the best basis to use for coal calories?

1.08.2011· They all are measuring the same coal - and there are formulas to convert between them. NAR is considered a useful measure by power plants. Here are some examples and formulas to convert between them. Coal Energy Conversions. Approximate GCV to NCV Conversion Values. ADB GAR NAR. 7000 6500 6200. 6300 5800 5500. 5800 5000 4700. 5500 4700 4400