Length & distance

Just how long is 1 picometre?

Microscopic

1 pm

1 × 10⁻¹² mmetres

3.2808 × 10⁻¹² ftfeet

6.2137 × 10⁻¹⁶ mimiles

6.6846 × 10⁻²⁴ AUastronomical units

1 picometre1 pmLength · definition

Electron2.426 pmCompton wavelength · measured constant

Both marked spans share one linear scale. Artwork keeps its proportions; poses and surface detail are illustrative.

A little perspective

The compton wavelength of Electron is about 2.43 times the length of 1 picometre.

Measurements, assumptions & sources +

1 picometre

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

NIST — SI conversion factors

Electron

The length shown is the electron Compton wavelength, not its diameter. In the Standard Model the electron is treated as pointlike; the cloud is a schematic.

NIST — 2022 CODATA fundamental constants

The marked compton wavelength is calibrated. Unmeasured illustration details are representative.

Measurement details

Why these numbers?

The visual compares length with compton wavelength. The records below preserve each value’s basis and caveats.

1 picometre

1 pm

Length · definition

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

Electron

2.426 pm

Compton wavelength · measured constant

The length shown is the electron Compton wavelength, not its diameter. In the Standard Model the electron is treated as pointlike; the cloud is a schematic.

Comparing: Length ↔ Compton wavelength
Relative size: Electron is larger on this measurement by a factor of about 2.43. Electron's selected measurement is approximately 143% greater than 1 picometre's.