How many cells are in the human body?
Science hard Data from 2013
Guess before you scroll — the answer is below
The answer
37,200,000,000,000 cells
Roughly 37.2T.
The most cited estimate is about 37.2 trillion cells for a standard adult, built up by counting cell types organ by organ. Red blood cells alone account for roughly 84% of the total by number while being a tiny share of body mass. Earlier textbook figures of "10 trillion" were guesses.
Where this number comes from
| Source | Bianconi et al., Annals of Human Biology |
|---|---|
| Figure refers to | 2013 |
| Last checked | |
| Unit | cells |
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