British thermal unit (International Table)

Scope and distinctions

International Table convention only; generic BTU may refer to other thermal conventions.

Available operations

UUCE executable Preview · Use cx:Btu_IT with a compatible unit and a pinned snapshot.

No legacy converter is linked for this definition.

Verification scope

UUCE conversion capability

units.convert version 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

• 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: 2026-10-29

  Factual definition relationships are independently encoded; no source prose or media redistributed.