How many calories are in wood and can humans digest it?
                                
                                
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                                    3 min read                                
                            
                                The calorific value of oven-dry wood is remarkably consistent across many species, averaging between 18.5 and 19 megajoules per kilogram. However, the question of how many calories are in wood is more complex than it seems, especially when considering human digestion versus its use as a fuel source.