steradian (sr)

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

The steradian (symbol sr) is a named SI derived unit of solid angle, per the BIPM SI Reference Point.

Name: steradian
Symbol: sr
Unit type: Named SI derived unit
Quantity kind: solid angle
Expressed in base SI units: m² m⁻²
Defining resolution: https://si-digital-framework.org/bodies/CGPM#CGPM11-Res12
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