Definition availableExact definition Candidate definition
British thermal unit (International Table)
BTUcx:Btu_IT · Energy
1 BTU = 1055.05585262 J.
- Quantity kind
- Energy
- SI dimension
L^2 · M · T^-2- Allowed roles
- Scalar
- Unit system / convention
- Other conventions
- Registry code
Btu_IT
Scope and distinctions
International Table convention only; generic BTU may refer to other thermal conventions.
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
- NBS (now NIST) — Heating Values of Natural Gas and Its Components
NBSIR 82-2401, August 1982, Appendix A3.2.2
Appendix A3.2.2, PDF p.84: exact International Table Btu in joules
Source checked:Factual definition relationships are independently encoded; no source prose or media redistributed.
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
d9eff49faea28d64911b1c5cf7f5bb49658c758830311a4c9f3b0fa89277fab4- Definition dependency digest
a1a310165f2bdaf06b3f15fd56410457592d48100c01b22f4d1621b6f5105a33
Digests identify definition content; they are not CVP evidence or production attestations.