Opened 17 months ago

Closed 15 months ago

Last modified 15 months ago

#194 closed question (answered)

Prefixes on non-SI units when commonly used in certain industries

Reported by: brunogirin Owned by:
Priority: minor Milestone:
Component: help Keywords:


The standard currently specifies that only SI units can take prefixes. However, there are instances where prefixes are used with non-SI units in particular industries. For instance, the retail gas industry in the United Kingdom often install gas meters that measure consumption in hecto-cubic-feet.

Should there be a way to describe industry specific exceptions to the above rule? (possibly with caveats that such units should be used carefully)

Change History (2)

comment:1 Changed 15 months ago by gschadow

  • Resolution set to answered
  • Status changed from new to closed

No, it's just a word. 100.[ft_i]3 does it also easy enough. Even if it was cubic centimeter, a "hecto cubic centimeter" doesn't exist. Now I would not be surprised if somewhere somebody has said thinks like kilo-miles or may be even hecto-feet but what people casually say doesn't mean it needs to be encoded as atomic symbols. They still can use UCUM to say precisely what they want, like 100.[ft_i] or 1000.[mi_i].

comment:2 Changed 15 months ago by brunogirin

Thanks for the answer, it makes complete sense and shows how powerful the UCUM format is.

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