Ounces to mL Converter
Convert fluid ounces (fl oz) to milliliters (mL) instantly. Choose US or UK/Imperial ounces for accurate results.
Tip: Press Enter in the ounces field to convert quickly.
How to Convert Ounces to Milliliters
If you cook, bake, mix drinks, or read product labels, you’ll often need to convert ounces to milliliters. Since ounces are common in the US and mL is used almost everywhere else, this is one of the most useful kitchen and nutrition conversions.
The formula is simple:
- US fluid ounces to mL: mL = ounces × 29.5735
- UK/Imperial fluid ounces to mL: mL = ounces × 28.4131
That small difference matters. If you use the wrong ounce type, your recipe or mixture can be slightly off.
Quick Reference Table (US fl oz to mL)
| US Fluid Ounces | Milliliters (mL) | Common Use |
|---|---|---|
| 1 oz | 29.57 mL | Small medicine cup amount |
| 2 oz | 59.15 mL | Shot + splash |
| 4 oz | 118.29 mL | Half cup (approx.) |
| 8 oz | 236.59 mL | One cup (US standard) |
| 12 oz | 354.88 mL | Typical soda can size |
| 16 oz | 473.18 mL | Pint (US, approx. 473 mL) |
| 32 oz | 946.35 mL | Quart (US, approx. 0.95 L) |
US vs UK Ounces: Why the Difference?
Many people assume an ounce is always the same, but fluid ounces differ by system:
- US fluid ounce: 29.5735 mL
- UK (Imperial) fluid ounce: 28.4131 mL
For a single ounce, the difference is small. Over larger volumes (like 20 oz or 30 oz), the gap becomes more noticeable. If a recipe is from the US, pick US ounces. If it’s from the UK, Australia, or older Commonwealth references, check whether Imperial units are used.
How to Use This Ounces to mL Calculator
Step-by-step
- Enter the number of fluid ounces.
- Select the ounce type (US or UK/Imperial).
- Click Convert to mL.
- Read the result and the exact formula used.
This gives you both speed and transparency, so you know exactly how the number was calculated.
Practical Everyday Examples
Cooking and Baking
Many online recipes list liquids in ounces. If your measuring tools are metric, converting to mL keeps your prep smooth and accurate.
Nutrition and Fitness
Protein shakes, hydration goals, and supplement instructions may use ounces. Converting to mL makes bottle tracking easier, especially if your bottle markings are metric.
Travel and Product Labels
Cosmetics, toiletries, and liquids in luggage limits are often listed in mL. If a bottle says 3.4 oz, that’s about 100.55 mL (US fl oz conversion), which is close to the well-known 100 mL travel rule.
Frequently Asked Questions
Is 8 oz equal to 240 mL?
It’s close, but not exact. In US units, 8 fl oz = 236.59 mL. Many people round to 240 mL for convenience.
Can I use this for dry ingredients?
No. Dry ounces measure weight, not volume. To convert dry ounces, use grams and include ingredient density when needed.
What if I need mL to ounces instead?
Reverse the formula: ounces = mL ÷ conversion factor (29.5735 for US, 28.4131 for UK).
Final Tip
For casual kitchen use, rounding to 1–2 decimal places is usually enough. For lab work, medical dosing, or precise formulations, keep more decimal places and verify whether the source uses US or UK fluid ounces.