How many bacteria live on a typical smartphone screen?
Science hard Data from 2023
Guess before you scroll — the answer is below
The answer
17,000 bacteria per square inch
Roughly 17K.
A typical phone screen carries around 17,000 bacteria per square inch — roughly ten times more than a toilet seat, which is cleaned regularly and rarely pressed against your face.
Where this number comes from
| Source | University of Arizona microbiology research |
|---|---|
| Figure refers to | 2023 |
| Last checked | |
| Unit | bacteria per square inch |
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