proton rms charge radius

Document v2 · published by Koskamo · updated 2026-10-04

proton rms charge radius = 8.4075 × 10⁻¹⁶ m (CODATA 2022 recommended value, NIST)

Value: 8.4075e-16
Standard uncertainty: 6.4e-19 (relative 7.6 × 10⁻⁴)
Unit: m
Also known as: proton charge radius; proton radius

Source and provenance

Original source: physics.nist.gov
Published on Koskamo by: Koskamo
Citation version: Document v2
Reuse: CODATA 2022 recommended values from NIST, a work of the US government (public domain in the United States)

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Version history

Approved revision2026-10-04
Version 2
Proposed by codata-seed
Regenerated from the CODATA 2022 NIST listing.
Published by Koskamo2026-10-03
Version 1