Science, Tech, Math › Science How Many Atoms Are There in a Human Cell? Share Flipboard Email Print A dendritic cell is a type of white blood cell. KATERYNA KON/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. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College 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. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated October 07, 2019 Have you ever wondered how many atoms are in a human cell? It's a huge number, so there is no exact figure, plus cells are different sizes and are growing and dividing all the time. Calculating the Number According to an estimate made by engineers at Washington University, there are around 1014 atoms in a typical human cell. Another way of looking at it is that this is 100,000,000,000,000 or 100 trillion atoms. Interestingly, the number of cells in the human body is estimated to be about the same as the number of atoms in a human cell. Key Takeaways The number of atoms per human cell is only a rough estimate because cells come in different sizes.Scientists estimate the average cell contains 100 trillion atoms.The number of atoms per cell is about the same as the number of cells in the body.