Noah Sinclair
The human body is made up of 7 octillion atoms, or 7 billion billion billion atoms. This is a huge number and no exact figure can be given as cells come in different sizes and are constantly growing and dividing.
| Characteristics | Values |
|---|---|
| Atoms in a human body | 7 octillion |
| Atoms in a human cell | 1014 |
| Atoms in a grain of sand | 1.948x1021 |
| Atoms in a book | 106 |
What You'll Learn
How many atoms in a human cell?
The number of atoms in a human cell is estimated to be around 1014 or 100,000,000,000,000 atoms. This is a rough estimate because cells come in different sizes and are growing and dividing all the time.
The number of atoms per human cell is only a rough estimate because cells come in different sizes and are growing and dividing all the time.
The number of atoms in one person is almost too big to write out. But fortunately there's a shorthand system, called scientific notation, that we use instead for writing really BIG or really SMALL numbers.
Hydrogen, oxygen and carbon make up about 99% of the average human. I'm going to cheat a little and leave out the other 1%, which is made up of trace elements (that is, stuff there's only a trace of in the body).
The number of atoms in one person is almost too big to write out. But fortunately there's a shorthand system, called scientific notation, that we use instead for writing really BIG or really SMALL numbers.
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How many atoms in the human body?
The number of atoms in the human body is estimated to be around 7 octillion or 7 billion billion billion atoms. This is a massive number and is only 3.5 million times as much as the grain of sand.
Hydrogen, oxygen and carbon make up about 99% of the average human body. The remaining 1% is made up of trace elements.
The number of atoms in one person is almost too big to write out. However, fortunately, there's a shorthand system, called scientific notation, that we use instead for writing really BIG or really SMALL numbers.
The number of atoms in one human cell is around 1014 atoms. This is 100,000,000,000,000 or 100 trillion atoms.
The number of atoms per human cell is only a rough estimate because cells come in different sizes and are growing and dividing all the time.
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How many atoms in a grain of sand?
There are 100,000,000,000,000,000,000 (1020) atoms in a grain of sand.
This is calculated by multiplying the number of particles per mole by the number of moles of SiO2. One grain of sand has a mass of 0.67 mg or 6.7*10-4 grams. Divide 6.7*10-4 by 60.08 and we find that we have 1.1*10-5 moles of SiO2. Multiplying that by the number of particles per mole and we get 6.7*1018 molecules of SiO2. In each molecule of quartz, we have 3 atoms (1 silicon and 2 oxygen), so this means there are roughly 2*1019 atoms in a small grain of sand.
There are 7 octillion atoms in a human body. This is 7 billion billion billion atoms. Only 3.5 million times as much as the grain of sand, go figure! Still not even close to a googol: 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,00
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How many atoms in a fingertip?
The human body is made up of 7 octillion atoms or 7 billion billion billion atoms. This is only 3.5 million times as much as the grain of sand.
The number of atoms in one person is almost too big to write out. Hydrogen, oxygen and carbon make up about 99% of the average human.
Engineers at Washington University estimate that there are around 1014 atoms in a typical human cell. This is 100,000,000,000,000 or 100 trillion atoms.
The number of atoms per human cell is only a rough estimate because cells come in different sizes.
A typical book can be printed with 106 zeros. Therefore, it requires 1094 such books to print all the zeros of a googolplex.
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How many atoms in a book?
The number of atoms in the human body is estimated to be around 7 octillion or 7 billion billion billion atoms.
This is a rough estimate as the human body is made up of different types of cells and cells are different sizes.
The number of atoms in a human cell is also estimated to be around 1014 atoms or 100 trillion atoms.
Now, the number of atoms in a book is dependent on the size of the book and the number of pages and zeros in the book.
A typical book can be printed with 106 zeros (around 400 pages with 50 lines per page and 50 zeros per line).
Therefore, it requires 1094 such books to print all the zeros of a googolplex (that is, printing a googol of zeros).
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Frequently asked questions
There are 7 octillion atoms in a human body.
There are around 1014 atoms in a typical human cell.
There are 1.948x1021 atoms in one imperial grain of quartz.
