Imperial, Metric, and US Conversions

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Sous Chef
Aug 31, 2004
jasonr said:
Is a fl oz a volume or mass measurement?
Strictly speaking a fluid oz is a measure of volume

Fortunately one fluid oz water (measured by either the US or British Imperial system) is basically equal to one oz by weight.

Liquids with a similar density to water, such as milk, also conform to the conversion that 1 fluid oz (volume) = 1 oz (weight).

If, however, you're measuring a heavier liquid (such as honey), this "equality" doesn''t hold.
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