Science, Tech, Math › Science Elemental Composition of the Human Body by Mass Typical Elements in a Person Share Flipboard Email Print The most abundant element in the human body by mass is oxygen. MEHAU KULYK/SCIENCE PHOTO LIBRARY / Getty Images Science Chemistry Biochemistry Basics Chemical Laws Molecules Periodic Table Projects & Experiments Scientific Method Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate by Anne Marie Helmenstine, Ph.D. Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. Updated February 03, 2019 This is a table of the elemental composition of the human body by mass for a 70 kg (154 lb) person. The values for any particular person may be different, especially for the trace elements. Also, the element composition does not scale linearly. For example, a person who is half the mass may not contain half the amount of a given element. The molar amount of the most abundant elements is given in the table. You may also wish to view the element composition of the human body in terms of mass percent. Reference: Emsley, John, The Elements, 3rd ed., Clarendon Press, Oxford, 1998 Table of Elements in the Human Body by Mass oxygen 43 kg (61%, 2700 mol) carbon 16 kg (23%, 1300 mol) hydrogen 7 kg (10%, 6900 mol) nitrogen 1.8 kg (2.5%, 129 mol) calcium 1.0 kg (1.4%, 25 mol) phosphorus 780 g (1.1%, 25 mol) potassium 140 g (0.20%, 3.6 mol) sulfur 140 g (0.20%, 4.4 mol) sodium 100 g (0.14%, 4.3 mol) chlorine 95 g (0.14%, 2.7 mol) magnesium 19 g (0.03%, 0.78 mol) iron 4.2 g fluorine 2.6 g zinc 2.3 g silicon 1.0 g rubidium 0.68 g strontium 0.32 g bromine 0.26 g lead 0.12 g copper 72 mg aluminum 60 mg cadmium 50 mg cerium 40 mg barium 22 mg iodine 20 mg tin 20 mg titanium 20 mg boron 18 mg nickel 15 mg selenium 15 mg chromium 14 mg manganese 12 mg arsenic 7 mg lithium 7 mg cesium 6 mg mercury 6 mg germanium 5 mg molybdenum 5 mg cobalt 3 mg antimony 2 mg silver 2 mg niobium 1.5 mg zirconium 1 mg lanthanum 0.8 mg gallium 0.7 mg tellurium 0.7 mg yttrium 0.6 mg bismuth 0.5 mg thallium 0.5 mg indium 0.4 mg gold 0.2 mg scandium 0.2 mg tantalum 0.2 mg vanadium 0.11 mg thorium 0.1 mg uranium 0.1 mg samarium 50 µg beryllium 36 µg tungsten 20 µg Continue Reading Human Body Composition as Elements and Compounds How Many Atoms Are in the Human Body? What Are the Main Elements in the Human Body? What Is the Sun Made Of? Table of Element Composition These Are the Elements in the Human Body How to Calculate Mass Percent Composition Which Elements Are in the Human Body? What is the Universe Made Of? Know the Most Abundant Chemical Element What Exactly Is in Table Salt? Determine Percent Composition by Mass Using This Worked Sample Problem Understand the Difference Between Atomic Mass and Mass Number Understand the Difference Between Weight and Mass What Is in Your Urine? Take a Look at the Chemical Composition An Astronaut is Stuck in Space Without a Spacesuit: What Happens? How Much Water Is in the Human Body?