Radian

Scope and distinctions

Plane angle, not a generic ratio, solid angle, or frequency. No implicit wrap or principal-angle reduction.

Available operations

These links open existing tools under their own contracts. They have not been migrated to the new unit registry.

• Radians to degrees ↗ Existing converter

Verification scope

New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.

Candidate is a registry lifecycle state. It is not a completed review or CVP verification.

Definition sources

• BIPM — The International System of Units (SI)

  9th edition, version 4.01, June 2026

  Tables 2, 4 and 5: SI units; Table 7: SI prefixes

  Source checked: 2026-10-29

  Definition metadata attributed to BIPM; brochure licensed CC BY 4.0.