Everyday · #979 biggest of 1,014
How big is a grain of salt?
300 µm
A grain of salt measures 300 µm. That's about 4.29 human-hair widths lined up end to end.
By the numbers
- That's 300 micrometers (µm) — far too small to see with the naked eye.
- You'd need about 5,667 of them stacked up to reach the height of an average adult.
- Roughly 4.29 human-hair widths could line up across it.
- Out of all 1,014 things in this collection, it ranks #979 by size.
Size comparison
How grain of salt stacks up against things of a similar size. Tap any bar to explore it.
grain of sand
5.0e+2 µm
grain of sugar
5.0e+2 µm
grain of sand
5.0e+2 µm
dust mite
3.0e+2 µm
grain of salt
3.0e+2 µm
human egg cell
1.0e+2 µm
neuron
1.0e+2 µm
circuit trace
1.0e+2 µm
human hair (width)
70 µm
Bars use a logarithmic scale so everything fits — real differences are even more extreme!
Fun fact
It's so small that about 3.33 of them would fit across a single millimeter.
More in Everyday
Tip: swipe, use the arrow keys, or scroll past the edge to jump between sizes.