29.6mL
Ounces to Milliliters
US fl oz, UK fl oz, and weight oz: which one do you have?
Tip: you can type “8 oz flour” or “500 ml to oz”.
1 US fluid ounce =
Try:
about ⅔2/3 of a 1.5 fl oz shot
Reading this as US fluid ounces — the most common; check your label.
Did you mean:
For:
Details
Weighs about 29.6 g as
All units
- mL
- 29.6
- L
- 0.0296
- US cup
- 0.125
- US tbsp
- 2
- US tsp
- 6
- US pint
- 0.0625
- US qt
- 0.0313
- US gal
- 0.00781
How we got this
1 US fluid ounce × 29.5735295625 mL/fl oz = 29.57353 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.
Also useful:
"Ounce" names four different units, and only two of them are volumes. A US fluid ounce is 29.5735 mL. A UK fluid ounce is 28.4131 mL, about 4% smaller. If the label says fl oz and the product is a liquid, one of those two is what you have.
A plain oz on a food package or in a recipe ingredient list is a weight: 28.3495 g. You can't turn grams into milliliters without knowing what the stuff is, because a milliliter of honey weighs far more than a milliliter of flour. Water is the easy case. 1 oz of water weighs 28.35 g and fills about 28.35 mL.
Quick answers
- 1 US fl oz
- 29.57 mL
- 1 UK fl oz
- 28.41 mL
- 1 oz of water
- 28.35 mL
Formula
mL = US fl oz × 29.5735295625US fl oz = mL ÷ 29.5735295625mL = UK fl oz × 28.4130625UK fl oz = mL ÷ 28.4130625mL = oz × 28.349523125 ÷ density (g/mL)
Conversion table
| Amount | US fl oz to mL | UK fl oz to mL | oz of water to mL |
|---|---|---|---|
| 1 | 29.57 | 28.41 | 28.35 |
| 2 | 59.15 | 56.83 | 56.7 |
| 3 | 88.72 | 85.24 | 85.05 |
| 4 | 118.3 | 113.7 | 113.4 |
| 5 | 147.9 | 142.1 | 141.7 |
| 6 | 177.4 | 170.5 | 170.1 |
| 7 | 207 | 198.9 | 198.4 |
| 8 | 236.6 | 227.3 | 226.8 |
| 9 | 266.2 | 255.7 | 255.1 |
| 10 | 295.7 | 284.1 | 283.5 |
| 12 | 354.9 | 341 | 340.2 |
| 16 | 473.2 | 454.6 | 453.6 |
| 16.9 | 499.8 | 480.2 | 479.1 |
| 20 | 591.5 | 568.3 | 567 |
| 24 | 709.8 | 681.9 | 680.4 |
| 32 | 946.4 | 909.2 | 907.2 |
| 50 | 1,479 | 1,421 | 1,417 |
| 64 | 1,893 | 1,818 | 1,814 |
| 100 | 2,957 | 2,841 | 2,835 |
Which ounce?
| Ounce | Exactly | Used for |
|---|---|---|
| Ounce (oz) | 28.349523125 g | Food, mail, kitchen scales, the default meaning of a bare “oz”. |
| US fluid ounce (US fl oz) | 29.5735295625 mL | US labels, bottles, cans. 16 of them make a US pint. |
| UK fluid ounce (UK fl oz) | 28.4130625 mL | UK recipes, older imperial labels. 20 of them make a UK pint. |
| Troy ounce (oz t) | 31.1034768 g | Gold, silver, platinum. About 10% heavier than the ounce on your kitchen scale. |
Common amounts
- 8 oz cup 237 mL
- 12 oz can 355 mL
- 16.9 oz bottle 500 mL
- 20 oz bottle 591 mL
- 3.4 oz TSA 100 mL
- 1.7 oz perfume 50 mL
- 8 oz steak 227 g
- 1 oz gold 31.1 g
Questions
How many mL is 1 oz?
It depends which ounce. 1 US fl oz is 29.5735 mL and 1 UK fl oz is 28.4131 mL. A weight ounce is 28.3495 g, which is only 28.35 mL if the ingredient is water. For anything else you need its density.
Why is a 16.9 oz bottle 500 mL?
16.9 US fl oz is 499.79 mL. Bottlers chose 500 mL for the global market, and US labels print the conversion, 16.9, instead of inventing a round American size.
Is a fluid ounce the same in the UK and the US?
No. The US fluid ounce is about 4.1% larger. One ounce hardly shows it, but a pint does: a US pint is 473 mL and a UK pint is 568 mL, because a UK pint holds 20 ounces and a US pint holds 16.
Why isn't 1 fl oz exactly 30 mL?
It was never defined in metric. The US fluid ounce is 1/128 of a US gallon, and the gallon is 231 cubic inches, which works out to 29.5735295625 mL. US nutrition labels round it to 30 mL and a cup to 240 mL as household measures, which is why a labeled serving can look slightly off in a measuring cup.
Can I convert a weight ounce to mL?
Only with a density. Divide the grams by the density in g/mL. All-purpose flour is about 0.53 g/mL, so 1 oz is about 53 mL. Granulated sugar is about 0.85 g/mL, so about 33 mL. The converter above has an ingredient menu for exactly this.