What is the measuring capacity of a ounce?

The measuring capacity of an ounce depends on whether you are referring to fluid ounces or ounces of weight (avoirdupois ounces).

Fluid ounces:

- 1 fluid ounce (fl oz) is equal to 29.5735 milliliters (mL) in the US Customary System.

- 1 fluid ounce is also approximately equal to 1 US tablespoon (tbsp).

- There are 8 fluid ounces in a US cup (c).

Avoirdupois ounces:

- 1 avoirdupois ounce (oz) is equal to 28.3495 grams (g).

- There are 16 avoirdupois ounces in 1 pound (lb).

So, depending on whether you're measuring volume (fluid ounces) or weight (avoirdupois ounces), the measuring capacity of an ounce will be different.