Oz to mL Converter
Convert fluid ounces to milliliters, or milliliters to fluid ounces, in US or UK ounces, with cups, tablespoons, teaspoons and liters.
Results
| Item | Value |
|---|
Quick Answer
Multiply US fluid ounces by 29.5735 to get milliliters. 8 US fl oz is 236.59 mL, 12 fl oz (a can of soda) is 354.88 mL, and 16 fl oz is 473.18 mL. A UK fluid ounce is smaller, 28.4131 mL, so 8 UK fl oz is 227.30 mL. To go back, divide mL by 29.5735.
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Table of Contents
- Oz to mL Converter
- Quick Answer
- Related Calculators
- How This Oz to mL Converter Works
- How to Use the Oz to mL Converter
- Oz to mL Formulas
- Key Terms
- Worked Example
- Real-Life Examples
- US Fluid Ounce vs UK Fluid Ounce
- Fluid Ounces to Milliliters Chart
- Fluid Ounces vs Ounces of Weight
- Common Mistakes to Avoid
- Frequently Asked Questions
- References & Sources
How This Oz to mL Converter Works
Recipes, drink labels and medicine cups mix US customary units with metric ones. Enter an amount, choose whether you are converting ounces to milliliters or the other way, and pick US or UK fluid ounces. The converter gives the answer to two decimal places, plus liters, the other kind of fluid ounce, US cups, tablespoons and teaspoons.
Quick explanation: one US fluid ounce is just under 30 mL.
- US fl oz to mL: multiply by 29.5735.
- mL to US fl oz: divide by 29.5735.
- UK fl oz: use 28.4131 instead.
How to Use the Oz to mL Converter
- Choose ounces to milliliters or milliliters to ounces.
- Choose US or UK fluid ounces.
- Enter the amount.
- Press Calculate.
- Read the converted amount, plus liters, cups, tablespoons and teaspoons.
Oz to mL Formulas
- US fluid ounce: 1 fl oz = 29.5735295625 mL exactly (1/128 of a US gallon of 231 cubic inches)
- UK fluid ounce: 1 fl oz = 28.4130625 mL exactly (1/160 of an imperial gallon)
- mL from oz: mL = fl oz × 29.5735 (US) or × 28.4131 (UK)
- oz from mL: fl oz = mL ÷ 29.5735 (US) or ÷ 28.4131 (UK)
- Kitchen units: 1 US cup = 8 fl oz = 236.59 mL; 1 tbsp = 0.5 fl oz = 14.79 mL; 1 tsp = 4.93 mL
Key Terms
- Fluid ounce (fl oz): a unit of volume; US 29.57 mL, UK 28.41 mL.
- Milliliter (mL): one thousandth of a liter, equal to one cubic centimeter.
- Ounce (oz): a unit of weight, 28.35 grams, not the same as a fluid ounce.
- US customary units: the cups, pints and gallons used in the United States.
- Imperial units: the older British system with a larger pint and gallon.
Worked Example
A water bottle holds 750 mL. How many US fluid ounces is that?
- 750 ÷ 29.5735 = 25.36 US fl oz
- In UK fluid ounces: 750 ÷ 28.4131 = 26.40 fl oz
- In US cups: 25.36 ÷ 8 = 3.17 cups
Going the other way, a 20 fl oz bottle holds 20 × 29.5735 = 591.47 mL.
Real-Life Examples
- Drinks: a 12 fl oz can is 355 mL and a 16.9 fl oz bottle is 500 mL.
- Baby bottles: 4 fl oz of formula is 118 mL.
- Travel liquids: the 100 mL limit is 3.38 US fl oz.
- Recipes: convert UK recipes that use imperial fluid ounces.
US Fluid Ounce vs UK Fluid Ounce
- US fluid ounce: 29.5735 mL; 16 make a US pint (473 mL).
- UK fluid ounce: 28.4131 mL; 20 make an imperial pint (568 mL).
- Difference: a US fluid ounce is about 4.1% larger.
Fluid Ounces to Milliliters Chart
Exact factors: 29.5735295625 mL (US) and 28.4130625 mL (UK).
| Fluid ounces | US (mL) | UK (mL) |
|---|---|---|
| 0.5 fl oz | 14.79 mL | 14.21 mL |
| 1 fl oz | 29.57 mL | 28.41 mL |
| 2 fl oz | 59.15 mL | 56.83 mL |
| 3 fl oz | 88.72 mL | 85.24 mL |
| 4 fl oz | 118.29 mL | 113.65 mL |
| 6 fl oz | 177.44 mL | 170.48 mL |
| 8 fl oz | 236.59 mL | 227.30 mL |
| 12 fl oz | 354.88 mL | 340.96 mL |
| 16 fl oz | 473.18 mL | 454.61 mL |
| 20 fl oz | 591.47 mL | 568.26 mL |
| 32 fl oz | 946.35 mL | 909.22 mL |
| 64 fl oz | 1892.71 mL | 1818.44 mL |
| 128 fl oz | 3785.41 mL | 3636.87 mL |
Fluid Ounces vs Ounces of Weight
The word ounce is used for two different things. A fluid ounce (fl oz) is a volume. An ounce (oz) on a scale or a package of solid food is a weight, 28.35 grams. For water and drinks that are mostly water, 1 fluid ounce weighs about 1.04 ounces, so the two are close. For oil, honey or flour they are very different, so measure by the type of unit the recipe uses.
The US and UK fluid ounces are also different. The UK (imperial) fluid ounce is about 4% smaller, but the UK pint has 20 fluid ounces while the US pint has 16, so a UK pint (568 mL) is about 20% bigger than a US pint (473 mL). Nutrition labels in the US round 1 fl oz to 30 mL for serving sizes, which is why a label may say 8 fl oz (240 mL).
Common Mistakes to Avoid
- Mixing weight and volume. 8 oz of flour is not 8 fl oz.
- Using the UK factor for US labels. US products use 29.57 mL per fl oz.
- Rounding to 30 mL for large amounts. 64 fl oz is 1,893 mL, not 1,920 mL.
- Assuming pints are the same. A UK pint is 20 fl oz; a US pint is 16.
- Confusing mL and L. 1,000 mL make 1 liter.
Frequently Asked Questions
One US fluid ounce is 29.5735 mL, about 30 mL. One UK fluid ounce is 28.4131 mL.
8 US fl oz is 236.59 mL, about 237 mL.
500 mL is 16.91 US fl oz.
16 US fl oz is 473.18 mL.
Multiply US fluid ounces by 29.5735, or UK fluid ounces by 28.4131.
No. A fluid ounce is volume; an ounce is weight (28.35 g).
1 liter is 33.81 US fl oz or 35.20 UK fl oz.
US nutrition labels round to 30 mL per fluid ounce for serving sizes.
A standard US shot of 1.5 fl oz is 44.4 mL.
References & Sources
| Source | Used For | Link |
|---|---|---|
| NIST, Guide to the SI, Appendix B.8 | US and imperial fluid ounce in milliliters. | https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8 |
| NIST Handbook 44, Appendix C: General Tables of Units of Measurement | US gallon of 231 cubic inches and its subdivisions. | https://www.nist.gov/pml/owm/nist-handbook-44-current-edition |