gray (Gy)

Document v1 · published by Koskamo · updated 2026-10-05

The gray (symbol Gy) is a named SI derived unit of absorbed dose and kerma, per the BIPM SI Reference Point.

Name: gray
Symbol: Gy
Unit type: Named SI derived unit
Quantity kind: absorbed dose; kerma
Expressed in base SI units: m² s⁻²
Expressed in other SI units: J kg⁻¹
Defining resolution: https://si-digital-framework.org/bodies/CGPM#CGPM15-Res9
SI prefix restriction: false

Source and provenance

Original source: si-digital-framework.org
Published on Koskamo by: Koskamo
Citation version: Document v1
Reuse: BIPM SI Reference Point (si-digital-framework.org), the SI defining constants, base and derived units, and prefixes; CC BY 3.0 IGO

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Version history

Published by Koskamo2026-10-05
Version 1