Definition:Imperial/Volume/Fluid Ounce

Definition

The fluid ounce is an imperial unit of volume.

It is also part of the apothecaries' system of volume.

Conversion Factors

\(\ds \)

\(\)

\(\ds 1\)

fluid ounce

\(\ds \)

\(=\)

\(\ds 8\)

fluid drachms

\(\ds \)

\(=\)

\(\ds \dfrac 1 {20}\)

(imperial) pint

\(\ds \)

\(=\)

\(\ds 28 \cdotp 41306 \, 25\)

millilitres

Sources

• 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $20$
• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $20$
• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): apothecaries' system: 2.
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): apothecaries' system: 2.