100 picometres
100 pmLength · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Length & distance
Just how long is 100 picometres?
Microscopic
100 pm
1 × 10⁻¹⁰ mmetres
3.2808 × 10⁻¹⁰ ftfeet
6.2137 × 10⁻¹⁴ mimiles
6.6846 × 10⁻²² AUastronomical units
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100 picometres100 pmLength · definition
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Hydrogen atom105.8 pmCharacteristic size · representative
Both marked spans share one linear scale. Artwork keeps its proportions; poses and surface detail are illustrative.
A little perspective
The characteristic size of Hydrogen atom is about 1.06 times the length of 100 picometres.
Measurements, assumptions & sources +
100 picometres
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Hydrogen atom
A diameter of twice the Bohr radius, used as a characteristic scale. An electron cloud has no hard outer surface.
NIST — 2022 CODATA fundamental constants
The marked characteristic size is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
The visual compares length with characteristic size. The records below preserve each value’s basis and caveats.
Hydrogen atom
105.8 pmCharacteristic size · representative
A diameter of twice the Bohr radius, used as a characteristic scale. An electron cloud has no hard outer surface.
- Comparing
- Length ↔ Characteristic size
- Relative size
- Hydrogen atom is larger on this measurement by a factor of about 1.06. Hydrogen atom's selected measurement is approximately 5.84% greater than 100 picometres's.
How to read the visual
The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.
- Hydrogen atom is labelled representative; treat the displayed value as a comparison anchor rather than false precision.
Change your perspective
Put it next to…
Choose a suggestion to redraw the comparison, or open its page to learn what it is.
A little smaller. A little larger.