Definition availableExact definition Candidate definition
Hour
hcx:h · Time interval
1 h = 3600 s.
- Quantity kind
- Time interval
- SI dimension
T- Allowed roles
- Scalar
- Unit system / convention
- Accepted with SI
- Registry code
h
Scope and distinctions
Exactly 3600 seconds of elapsed time; not civil-time or calendar arithmetic.
Available operations
UUCE executable Preview · Use cx:h with a compatible unit and a pinned snapshot.
No legacy converter is linked for this definition.
Verification scope
- UUCE conversion capability
units.convert@0.1.1· VERIFIED- Production binding at publication
- CURRENT
The definition lifecycle describes this registry entry. CVP status describes the conversion capability and the cases and rejection partitions in its Manifest. CVP Manifest · Public replay cases
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
Section 4, Table 8: hour
Source checked:Definition metadata attributed to BIPM; brochure licensed CC BY 4.0.
Definition and registry versions
- Definition revision
- 1.1.0
- Registry snapshot
- 0.3.0-preview.3 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
884543ca4519d493b91ddcd865d275ed183bc21b69280fe960f54e254a8e1eed- Definition dependency digest
2e29d92459baef7922e3faacd06f9057d581ab9b6cd461fdb34f839c38b68044
Digests identify definition content; they are not CVP evidence or production attestations.