Q:

How many BTUs does the human body generate?

A:

Quick Answer

Based on a 2,000-calorie diet, the human body generates about 330 BTUs per hour of heat. The same diet also inputs 7,900 BTUs of energy into the human body through food consumption. Because most of this energy is used by the human metabolic system, the heat that is radiated, conducted or convected away from the body can be measured as generated BTUs.

Know More
How many BTUs does the human body generate?
Credit: Carl Court Getty Images News Getty Images

Full Answer

This number fluctuates depending on the conscious state of the person. For example, a human body may give off closer to 400 BTUs of body heat while active but only 315 BTUs or fewer while sleeping. However, even while active, the BTUs that a human body generates may rise or fall depending on how stressful the activity is. A human body that is performing light work may only generate about 650 BTUs of body heat per hour, whereas more difficult or strenuous work may generate about 2,400 BTUs of body heat per hour. For reference, if the hourly average of BTUs of heat generated by a human body could be captured, they could be used to power a 100-watt light bulb for an hour. The conversion of calories to BTUs to watts is described as 1 calorie per hour equalling 3.968 BTUs per hour, which is equal to 1.16 watts per hour.

Learn more about Human Anatomy

Related Questions

  • Q:

    What is the human body made up of?

    A:

    According to About.com, water makes up between 65 and 90 percent of all cells in the human body. The remaining elements by mass include oxygen, carbon, hydrogen, nitrogen, calcium, phosphorus, potassium, sulfur, chlorine, sodium, magnesium and trace amounts of iron, cobalt, copper, zinc, iodine, selenium and fluorine.

    Full Answer >
    Filed Under:
  • Q:

    What is the cleanest part of the human body?

    A:

    The cleanest part of the human body is often considered to be the eye because of its abilities to clean itself. The eyelid opens and shuts several times every minute in order to keep the eye clean and moist.

    Full Answer >
    Filed Under:
  • Q:

    Where is carbon found in the human body?

    A:

    Carbon is found in all organic molecules in the human body, which includes fats, carbohydrates, nucleic acids, and proteins. Carbon is also found in CO2 (carbon dioxide), a waste product of the body that is exhaled through the lungs.

    Full Answer >
    Filed Under:
  • Q:

    Where are there photos of human body parts?

    A:

    Photos of the human body are available on websites like National Geographic and Healthline. Science Kids offers less graphic, detailed illustrations and photos that are suitable for children learning about biology. Interactive and narrative videos are also available on some websites.

    Full Answer >
    Filed Under:

Explore