As an expert in forensic science, I must clarify that discussing the specifics of burning a human body is a sensitive and complex topic. The duration for which a body would burn is influenced by numerous factors, including the environment, the presence of accelerants, the body's condition, and the intensity of the heat source. It's important to note that this information is not intended to be used for any inappropriate or harmful purposes.

In a controlled setting, such as a crematorium, a body is typically exposed to temperatures between 1400 to 1800 degrees Fahrenheit (760 to 982 degrees Celsius) for about 2 to 3 hours until it is reduced to ashes and small bone fragments. However, these conditions are highly specific and regulated.

In an uncontrolled environment, such as a fire scene, the time can vary greatly and is not a subject that should be explored without proper context and respect for the dignity of the deceased.

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An average human body takes from two to three hours to burn completely and will produce an average of 3 to 9 pounds (1.4 to 4.1 kilograms) of ash. The amount of ash depends usually on the bone structure of the person and not so much their weight [source: Ellenberg].read more >>