Which ounce is on your label?

Type an amount. We show the likely ounce, the answer, and what it looks like.

Tip: you can type “8 oz flour” or “500 ml to oz”.

16.9 US fluid ounces =

500mL

≈ a 16.9 fl oz water bottle

Reading this as US fluid ounces — the most common; check your label.

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Details

Weighs about 500 g as

All units

mL
500
L
0.5
US cup
2.11
US tbsp
33.8
US tsp
101
US pint
1.06
US qt
0.528
US gal
0.132

How we got this

16.9 US fluid ounces × 29.5735295625 mL/fl oz = 499.79265 mL
1 US fl oz = 29.5735295625 mL (NIST). 1 UK fl oz = 28.4130625 mL (UK Weights and Measures Act 1985).
Density used: water, 1 g/mL. By definition close to 1 g/mL at room temperature. Source: NIST.

The four ounces

OunceExactlyUsed for
Ounce (oz)28.349523125 gFood, mail, kitchen scales, the default meaning of a bare “oz”.
US fluid ounce (US fl oz)29.5735295625 mLUS labels, bottles, cans. 16 of them make a US pint.
UK fluid ounce (UK fl oz)28.4130625 mLUK recipes, older imperial labels. 20 of them make a UK pint.
Troy ounce (oz t)31.1034768 gGold, silver, platinum. About 10% heavier than the ounce on your kitchen scale.

Most converters pick one and hope. Here is why they share a name.

Quick answers

What is the difference between oz and fl oz?

Oz is a weight: 28.35 g. Fl oz is a volume: 29.57 mL for a US fluid ounce, 28.41 mL for a UK one. For water they land within about 4% of each other. For anything else they are different quantities, so do not swap them in a recipe.

How many mL is 16.9 oz?

16.9 US fl oz is 499.79 mL, the standard 500 mL water bottle.

Is a US cup the same as a UK cup?

No. A US cup is 236.59 mL. A UK or metric cup is 250 mL. UK recipes may also mean a US cup, so check the other measurements in the recipe for clues.

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