1/2 cups to Fluid oz (US)
1/2 cups = 4 fl oz. That is the exact conversion for US kitchen measurements, where 8 fluid oz fill 1 cup.
0.5 cups × 8 = 4 fl oz
The formula
Multiply by 8: 1/2 × 8 = 4. To reverse it, divide by 8 instead.
1/2 cups × 8 = 4 fl oz
This uses the US cup of 236.588 mL, the standard for recipes written in cups. A metric cup (Australia and New Zealand) is 250 mL and an imperial cup is 284.13 mL, so a recipe from either of those places will need a different figure.
One check before you measure: this converts FLUID oz, which are volume. If your recipe lists a dry ingredient like flour or sugar in oz, that is weight, and the answer here does not apply, weigh it on a scale instead.
Nearby values
Frequently asked questions
1/2 cups is 4 fl oz, using the US cup of 8 fluid oz (236.588 mL).
Multiply 1/2 by 8 to get 4 fl oz. Dividing 4 by 8 takes you back to 1/2 cups.
No. This page converts fluid oz, a volume unit. Flour and sugar in a recipe are given in weight oz, and 8 weight oz of flour fills roughly 1.8 cups rather than 1 cup. Weigh dry ingredients on a scale.