Convert ml to fluid ounces

1 milliliter = 0.033814023 fl oz

Fluid ounce (US) (fl oz)
0.0338140227

1 mL = 0.033814 fl oz · type math like (12*4)+6.5

Milliliters to fluid ounces is used for drinks, cosmetics and baby bottles. Bottles and medicine syringes are labelled in milliliters worldwide, while US labels, bartending recipes and TSA rules talk about fluid ounces.

Cosmetics and skincare products sold internationally carry both units. A 50 ml moisturiser is 1.69 fl oz and a 200 ml shampoo is 6.76 fl oz. Perfume is often sold in 30 ml, 50 ml and 100 ml sizes, labelled 1.0, 1.7 and 3.4 fl oz in the US.

Baby feeding is another important use. Formula instructions in the US often refer to fluid ounces, while bottles and guidance elsewhere use milliliters. A 120 ml feed is 4.06 fl oz, and a 180 ml feed is 6.09 fl oz. Precision matters here, so use the milliliter markings when available.

Bartending in the US uses fluid ounces, but bars elsewhere use 25 ml, 35 ml or 50 ml measures. A 25 ml UK single measure is 0.85 fl oz, and a 50 ml double is 1.69 fl oz.

Wine bottles are standardised at 750 ml, which is 25.36 US fl oz, and a standard glass of wine is often defined as 150 ml, about 5.07 fl oz.

Sports drinks in Europe come in 500 ml or 750 ml bottles, which are 16.9 and 25.4 fl oz.

A quick check is that 30 ml is close to 1 fluid ounce, so the ounce figure should be about one thirtieth of the milliliter figure. 600 ml should come out near 20 fl oz (20.29 exactly). If you get about 21.1, you used UK fluid ounces. If your answer is bigger than the milliliter figure, the direction is wrong. Most bottles show both units, which is a handy way to check.

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The formula

fl oz = mL × 0.0338140227

Reverse: 1 fl oz = 29.57353 mL.

Worked example

How many US fluid ounces in a 500 ml bottle?

  1. 1 fl oz = 29.5735 ml, so 1 ml = 0.033814 fl oz.
  2. Multiply: 500 × 0.033814 = 16.907 fl oz.

Answer: 500 ml = 16.9 fl oz.

ml to fluid ounces conversion table

mLfl oz
¼ mL0.0084535057 fl oz
½ mL0.016907011 fl oz
¾ mL0.025360517 fl oz
1 mL0.033814023 fl oz
2 mL0.067628045 fl oz
3 mL0.10144207 fl oz
4 mL0.13525609 fl oz
5 mL0.16907011 fl oz
6 mL0.20288414 fl oz
7 mL0.23669816 fl oz
8 mL0.27051218 fl oz
9 mL0.3043262 fl oz
10 mL0.33814023 fl oz
11 mL0.37195425 fl oz
12 mL0.40576827 fl oz
13 mL0.4395823 fl oz
mLfl oz
14 mL0.47339632 fl oz
15 mL0.50721034 fl oz
16 mL0.54102436 fl oz
17 mL0.57483839 fl oz
18 mL0.60865241 fl oz
19 mL0.64246643 fl oz
20 mL0.67628045 fl oz
25 mL0.84535057 fl oz
30 mL1.0144207 fl oz
40 mL1.3525609 fl oz
50 mL1.6907011 fl oz
75 mL2.5360517 fl oz
100 mL3.3814023 fl oz
250 mL8.4535057 fl oz
500 mL16.907011 fl oz
1 000 mL33.814023 fl oz

Real-world examples

Airport liquids

The 100 ml carry-on limit is 3.38 fl oz, which is why US rules say 3.4 oz.

Soda can

A 330 ml European can is 11.16 fl oz; US cans are 12 fl oz (355 ml).

Water bottle

A 500 ml bottle is 16.9 fl oz.

Common mistakes

US vs UK fluid ounces

A UK fluid ounce is 28.41 ml. 500 ml is 16.9 US fl oz but 17.6 UK fl oz.

Confusing fluid ounces with ounces of weight

Fluid ounces measure volume. Only for water-like liquids is 1 fl oz close to 1 oz in weight.

Rounding to 30 ml

Bartenders use 30 ml per ounce, but on 750 ml that gives 25 fl oz instead of 25.36.

What is a milliliter?

A milliliter is one thousandth of a liter, exactly one cubic centimeter (cm³).

Origin. Part of the metric system, a thousandth of the 1795 liter.

Used today. Drinks, medicine, perfume, cooking and lab work.

What is a US fluid ounce?

One US fluid ounce is 1/128 of a US gallon, exactly 29.5735295625 ml.

Origin. It derives from the wine gallon. The imperial fluid ounce (28.41 ml) is slightly smaller and is used in the UK.

Used today. US drink sizes, cocktail measures and personal-care product labels.

Frequently asked questions

How many fl oz is a 750 ml wine bottle?

25.36 US fl oz.

Is 100 ml exactly 3.4 oz?

It is 3.38 US fl oz; TSA rounds up to 3.4.

How many ml in a shot?

A US shot is 1.5 fl oz, about 44 ml.

What is 1 liter in fluid ounces?

33.81 US fl oz.

Are baby bottle markings in US or UK ounces?

Most bottles sold in the US use US fl oz; UK bottles may show imperial ounces. Check the ml scale to be safe.

Convert fluid ounces to ml →

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