Convert fluid ounces to centilitres

Content last reviewed:

1.5 fl oz is 4.44 cl, because a US fluid ounce is 29.5735 ml and a centilitre is 10 ml. Type the ounces from a recipe or label, fractions like 3/4 or 1½ included, and pick US or UK / Imperial with the Ounce type switch.

US fl oz
cl
Ounce type
to

How many centilitres is 1.5 oz?

1.5 US fluid ounces is 4.44 cl. A US fluid ounce is about 29.5735 ml and a centilitre is 10 ml[1], so you multiply the ounces by 29.5735 and divide by 10. In short: cl = oz × 2.957.

A UK fluid ounce is a twentieth of a pint of 0.56826125 litres[2], or 28.4131 ml, so the same number of ounces gives fewer centilitres: 1.5 UK fluid ounces is 4.26 cl. Choose it with the UK / Imperial option of the Ounce type switch. For a recipe from an American website, keep the default US option.

If you would rather see the answer in millilitres, use the oz to ml converter. Ounces from baking recipes that also use cups are handled by the ounces to cups converter.

Ounces to centilitres conversion table

The table starts at a quarter of an ounce because cocktail recipes give liquids in fractions: 1/4, 1/2, 3/4 and 1 1/2 oz. Results are rounded to two decimal places.
Fluid ouncesUS fluid ounceUK fluid ounce
0.25 fl oz0.74 cl0.71 cl
0.5 fl oz1.48 cl1.42 cl
0.75 fl oz2.22 cl2.13 cl
1 fl oz2.96 cl2.84 cl
1.25 fl oz3.7 cl3.55 cl
1.5 fl oz4.44 cl4.26 cl
2 fl oz5.91 cl5.68 cl
2.5 fl oz7.39 cl7.1 cl
3 fl oz8.87 cl8.52 cl
4 fl oz11.83 cl11.37 cl
5 fl oz14.79 cl14.21 cl
6 fl oz17.74 cl17.05 cl
8 fl oz23.66 cl22.73 cl
10 fl oz29.57 cl28.41 cl
16 fl oz47.32 cl45.46 cl
20 fl oz59.15 cl56.83 cl

How many centilitres is a US standard drink?

The National Institute on Alcohol Abuse and Alcoholism (NIAAA) counts one standard drink as 14 grams of pure alcohol. That amount is in 12 fl oz of regular beer, 5 fl oz of table wine or a 1.5 fl oz shot of spirits, which the institute also calls a single jigger[3]. A British single small shot is 25 ml[4], so the American shot of 4.44 cl is about 1.8 times as big.
A steel double jigger on a wooden counter with a glass jug behind it
A steel jigger with two cups joined at their narrow ends stands on a wooden counter, with a glass jug behind it. Jiggers like this measure the fractions in cocktail recipes, such as 3/4 oz, which is 2.22 cl. Photo: Shawn DENG, Unsplash.
ServingDrinkCentilitres
12 fl ozRegular beer at about 5%35.49 cl
5 fl ozTable wine at about 12%14.79 cl
1.5 fl ozDistilled spirits at 40%4.44 cl

Which ounce entries does this converter accept?

The field accepts and converts each of these entries, so there is nothing to tidy up before you paste. The table shows what the converter does with each one, and the converter itself worked out the results.
What you typeWhat the converter showsNote
1.54.44 clThe point is the decimal separator, as in English-language recipes.
1 1/24.44 clA whole number with a fraction, written the way cocktail recipes write it, counts as one and a half ounces.
1½4.44 clThe field also understands a fraction character copied from a recipe.
¾2.22 clA fraction on its own counts as three quarters of an ounce.
3/42.22 clA fraction typed with a slash gives the same result.
2 fl oz5.91 clThe field ignores the fl oz abbreviation pasted with the number and works with the ounces.
2 fl. oz.5.91 clThe field also accepts the abbreviation written with full stops.
8 oz23.66 clThe field reads a plain oz as fluid ounces too.
2 fluid ounces5.91 clThe unit written out in full works as well.
1,0002,957.35 clA comma before three digits groups thousands, so the field reads one thousand. Under the field you will see the hint: Read as 1000. If you meant 1, type 1.

Convert other units to Centilitres

liters to centilitersmilliliters to centiliters

Convert Fluid ounces to other units

oz to mlounces to cups

Sources

  1. Handbook 44 – 2026, Appendix C. General Tables of Units of Measurement — National Institute of Standards and Technology
  2. Weights and Measures Act 1985, Schedule 1 — legislation.gov.uk
  3. What Is A Standard Drink? — National Institute on Alcohol Abuse and Alcoholism
  4. Calculating alcohol units — NHS

Every figure in the tables was computed from the unit definitions and checked arithmetically before publication. Historical values and the names of local units come from the sources listed above.

Content last reviewed: · written and checked by the Arteon team

Frequently asked questions about ounces and centilitres

Is 1 oz the same as 3 cl?

Not exactly. A US fluid ounce is 2.96 cl and a UK one is 2.84 cl, so 3 cl is 1.01 US fluid ounces or 1.06 UK ones.

How much bigger is a US fluid ounce than a UK one?

About 4%. NIST gives one US fluid ounce as 1.041 British fluid ounces[1], which is 0.12 cl more for every ounce.

How do I convert ounces to centilitres in my head?

Multiply the ounces by 3. For 4 oz that gives 12 cl, while the exact answer is 11.83 cl, so the shortcut comes out about 1.4% high.

Arteon free tool screenshot: Convert fluid ounces to centilitres

Have a question or a suggestion?

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