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imp fl oz\text{imp fl oz}

imperial fluid ounce

Volumeexact by definition

The imperial fluid ounce is exactly 1/160 of an imperial gallon, 28.4130625 millilitres. It is used in the United Kingdom, Ireland and much of the Commonwealth, and it is about 4% smaller than the US fluid ounce.

Watch out: The US fluid ounce is 29.5735 mL. The imperial ounce is smaller but the imperial pint is larger, because a US pint holds 16 fluid ounces and an imperial pint holds 20. Both differences run in opposite directions, which makes casual conversion between the systems unusually easy to get wrong.

1 imp fl oz\text{imp fl oz} 0.028413063 L\text{L}
Where the unit came from

It was defined so that one imperial fluid ounce of water weighs almost exactly one avoirdupois ounce, which is why the imperial system's volume and mass units line up for water and the US system's do not.

One imperial fluid ounce in every volume unit

28,413.1cubic millimeter (mm³)
28,413.1microliter (μL)
28.4131milliliter (mL)
28.4131cubic centimeter (cm³)
5.76456US teaspoon (tsp)
2.84131centiliter (cL)
1.92152US tablespoon (tbsp)
1.73387cubic inch (in³)
1imperial fluid ounce (imp fl oz)this unit
0.96076US fluid ounce (fl oz)
0.284131deciliter (dL)
0.120095US cup (cup)
0.0600475US pint (pt)
0.05imperial pint (imp pt)
0.0300237US quart (qt)
0.0284131liter (L)
0.0284131cubic decimeter (dm³)
0.025imperial quart (imp qt)
0.0120408board foot (fbm)
0.00750594US gallon (gal)
0.00625imperial gallon (imp gal)
0.0010034cubic foot (ft³)
0.000806294US bushel (bu)
0.000284131hectoliter (hL)
0.000242127US beer barrel (bbl beer)
0.000178713oil barrel (bbl)
0.0000371629cubic yard (yd³)
0.0000284131cubic meter (m³)
0.0000284131kiloliter (kL)
0.000010034hundred cubic feet (CCF)
0.00000783905cord (cord)
2.30348e-08acre-foot (ac·ft)
7.50594e-09million US gallons (MG)
2.84131e-14cubic kilometer (km³)
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