Definition availableExact definition Candidate definition
Micrometre
µmcx:um · Length
1 µm = 0.000001 m.
- Quantity kind
- Length
- SI dimension
L- Allowed roles
- Scalar
- Unit system / convention
- SI decimal multiples
- Registry code
um
Scope and distinctions
Definition metadata only. The quantity kind and model field contract determine compatible use; no new UUCE execution or CVP claim.
Available operations
No converter is linked for this definition yet. You can inspect the definition and its sources.
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:Definition metadata attributed to BIPM; brochure licensed CC BY 4.0.
Definition and registry versions
- Definition revision
- 1.0.0
- Registry snapshot
- 0.3.0-preview.3 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
c2b9a1d804696f52219f05d84af118badf4e05564ad086bdecec10ad04d7574c- Definition dependency digest
578cd4962be23ee98af454c083501de68ae05dbb20184b5a55e36887d30eb366
Digests identify definition content; they are not CVP evidence or production attestations.