Opened 9 years ago

Closed 7 years ago

#120 closed enhancement (fixed)

Metric household measures

Reported by: Gunther Schadow Owned by: Gunther Schadow
Priority: major Milestone: Revision 1.9
Component: Keywords:
Cc:

Description (last modified by Gunther Schadow)

For food labeling 21 CFR Part 101.9 (b) (5) (viii) requires metrically aligned customary units:

"For nutrition labeling purposes, a teaspoon means 5 milliliters (mL), a tablespoon means 15 mL, a cup means 240 mL, 1 fl oz means 30 mL, and 1 oz in weight means 28 g."

UCUM has:

tablespoon [tbs_us] 1 [foz_us]/2
teaspoon [tsp_us] 1 [tbs_us]/3
cup [cup_us] 16 [tbs_us]

and then traces fluid ounce and ounce through the factors/division by 2, 12, or 16 used in the customary unit system. So you end up with odd numbers:

  • 1 [foz_us] = 29.5735 mL
  • 1 [cup_us] = 236.5882 mL
  • 1 [tsp_us] = 4.9289 mL
  • 1 [tbs_us] = 14.7868 mL
  • 1 [oz_av] = 28.3495 g avoirdupois ounce
  • 1 [oz_ap] = 31.1035 g apothecaries ounce

we could potentially add metric spoons and ounces:

  • 1 [foz_m] = 30 mL
  • 1 [cup_m] = 240 mL
  • 1 [tsp_m] = 5 mL
  • 1 [tbs_m] = 15 mL
  • 1 [oz_m] = 28 g

may be that is what we should do.

Change History (2)

comment:1 Changed 8 years ago by Gunther Schadow

Milestone: Revision 1.9
Owner: set to Gunther Schadow
Status: newassigned

Then let's do it.

comment:2 Changed 7 years ago by Gunther Schadow

Description: modified (diff)
Resolution: fixed
Status: assignedclosed

done

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