Convert fluid ounces to milliliters (fl oz to mL)
To convert fluid ounces to milliliters, multiply the value in fluid ounces by 29.5735295625. Use it for American drink sizes, baby bottles, cocktail recipes and toiletries labelled in fluid ounces. This oz to ml converter works both ways: type fluid ounces or milliliters into either box above and the other box, the worked formula and the chart below update as you type.
The US fluid ounce (fl oz) is 1/128 of a US gallon, exactly 29.5735295625 mL. The imperial (UK) fluid ounce is slightly smaller at 28.4130625 mL. Fluid ounces appear on US drink cans, baby bottles, cocktail recipes, cosmetics and nutrition labels. One US fluid ounce is 29.5735 milliliters.
The milliliter (mL), or millilitre, is one thousandth of a liter — exactly one cubic centimeter, which is why doctors and engineers also call it a cc. Going the other way, one milliliter equals 0.033814 US fluid ounces. Milliliters are printed on drink cans and bottles, medicine syringes, cosmetics and metric recipes.
How to convert oz to ml with this tool
- Type a number into the US fluid ounces (fl oz) box — it starts at 12 fl oz as an example.
- Read the answer in the Milliliters (mL) box and in the result panel, which also shows the formula with your number.
- To go the other way, type into the milliliters box, or press the swap button to open the ML to Oz converter with your value carried over.
- Choose how many decimal places you want, or tap a quick value such as 2 fl oz, 4 fl oz, 8 fl oz.
- Press Copy result to paste the conversion into a message, spreadsheet or note.
Oz to ML converter features
Converts both ways
Type in the fluid ounces box to get milliliters, or in the milliliters box to get fluid ounces. The other box follows instantly.
Exact factor
Calculations use 1 fl oz = 29.5735295625 mL, and rounding is applied only to the answer you see — choose Auto or 0–10 decimal places.
Formula with your number
The working is shown under the result, for example 12 fl oz × 29.5735295625 = 354.8824 mL, so you can check it or copy the method.
Quick values and chart
Tap common values like 2 fl oz, 4 fl oz, 8 fl oz, or read the fluid ounces-to-milliliters table further down this page.
UK fluid ounces covered
Recipes from Britain use the imperial fluid ounce; the line under the result converts that version too.
Oz to ML formula
The formula is mL = fl oz × 29.5735295625. It is exact because a US fluid ounce is 1/128 of a US gallon, which is exactly 29.5735295625 mL.
The reverse formula is fl oz = mL ÷ 29.5735295625 — or use the ML to Oz converter. Three worked examples:
- A 12 fl oz soda can: 12 fl oz × 29.5735295625 = 354.8824 mL
- One US cup (8 fl oz): 8 fl oz × 29.5735295625 = 236.5882 mL
- The 3.4 fl oz travel limit: 3.4 fl oz × 29.5735295625 = 100.55 mL
US vs UK fluid ounces
A US fluid ounce is 29.5735 mL, while an imperial (UK) fluid ounce is 28.4131 mL — about 4% smaller. British, Irish and older Australian or Canadian recipes may use the imperial size, so check where a recipe comes from: 10 fl oz = 295.7353 mL, but 10 UK fl oz = 284.1306 mL.
A fluid ounce measures volume. The ounce on a kitchen scale measures weight — for that, use the grams to ounces or ounces to grams converter.
Oz to ML quick reference
The values people look up most often, worked out with the exact factor:
- 1 fl oz = 29.5735 mL
- 1 mL = 0.033814 fl oz
- 2 fl oz = 59.1471 mL
- 4 fl oz = 118.2941 mL
- 8 fl oz = 236.5882 mL
- 12 fl oz = 354.8824 mL
Quick tip: Multiply by 30 for a fast estimate (about 1.4% high): 6 fl oz ≈ 180 mL, versus the exact 177.4412 mL.
Related conversions: Cups to ML, ML to Cups and the full volume converter.
Oz to ML conversion table
Values in milliliters are rounded to 4 decimal places (more for very small numbers). For any value not listed, type it into the converter above.
| fl oz | mL | fl oz | mL |
|---|---|---|---|
| 0.25 | 7.3934 | 10 | 295.7353 |
| 0.5 | 14.7868 | 12 | 354.8824 |
| 1 | 29.5735 | 16 | 473.1765 |
| 2 | 59.1471 | 20 | 591.4706 |
| 3 | 88.7206 | 24 | 709.7647 |
| 3.4 | 100.55 | 32 | 946.3529 |
| 4 | 118.2941 | 48 | 1,419.5294 |
| 5 | 147.8676 | 64 | 1,892.7059 |
| 6 | 177.4412 | 128 | 3,785.4118 |
| 8 | 236.5882 |
Oz to ML FAQ
How many milliliters is 1 fl oz?
1 US fluid ounce is 29.5735 milliliters: 1 fl oz × 29.5735295625 = 29.5735 mL.
How do I convert oz to ml?
Multiply the value in fluid ounces by 29.5735295625. For example, 16 fl oz × 29.5735295625 = 473.1765 mL. To convert back, divide the value in milliliters by 29.5735295625 — or use the ML to Oz converter.
How many US fluid ounces are in one milliliter?
One milliliter is 0.03381 US fluid ounces, because 1 mL ÷ 29.5735295625 = 0.03381 fl oz.
What is 16 fluid ounces in milliliters?
Why does my US label say 1 fl oz = 30 mL?
US nutrition labels may round to 30 mL per fluid ounce for simplicity. The exact US fluid ounce is 29.5735295625 mL, so 16 fl oz = 473.1765 mL rather than 480 mL.