🥤 ML to OZ Converter (Milliliters to US Fluid Ounces)
By Shihab Mia · Updated 2026-07-30
This converter uses the US fluid ounce (1 fl oz = 29.5735295625 ml), the unit used on US food and drink labels. It is not the same as the UK/imperial fluid ounce, which equals about 28.41 ml, so a UK recipe measured in fl oz will need a slightly different ml value.
| US fl oz | Milliliters (ml) |
|---|
A ml to oz converter changes milliliters into US fluid ounces using one fixed factor: 1 US fluid ounce equals 29.5735295625 ml. To convert ml to oz, divide the milliliter value by 29.5735295625, so 250 ml becomes about 8.45 fl oz. To go the other way, multiply fluid ounces by 29.5735295625, so 8 fl oz becomes about 236.59 ml. Type a number into either box above and this tool instantly shows the matching value, which is exactly what you need when a US recipe, water bottle or supplement label is measured in a unit you are not used to.
What is the ML to OZ Converter?
Milliliters (ml) and US fluid ounces (fl oz) measure the same thing, liquid volume, but they come from two different measurement systems. The milliliter is a metric unit, one thousandth of a liter, used almost everywhere in the world including on nutrition labels and lab equipment. The US fluid ounce is a customary unit used mainly in the United States for drinks, cooking and personal care products. Because the two systems were never designed to line up neatly, converting between them needs a precise ml to oz factor rather than a round number: 1 US fl oz equals exactly 29.5735295625 ml.
The formula behind every ml to oz converter is simple division. Fluid ounces = milliliters divided by 29.5735295625. So a 500 ml water bottle holds about 16.91 fl oz, and a 355 ml soda can (the standard US can size) holds almost exactly 12 fl oz. Going the other direction, milliliters = fluid ounces multiplied by 29.5735295625, which is how a recipe written in US cups and fl oz gets translated into the metric measurements most kitchen scales and measuring jugs actually use.
One detail trips a lot of people up: the fluid ounce is not one universal unit. The US fluid ounce (29.5735295625 ml) is different from the UK, or imperial, fluid ounce (about 28.4130625 ml). The gap is small per ounce but adds up over a full bottle, so a UK recipe converted with the US factor will be noticeably off. This tool always converts using the US fluid ounce, which is the unit printed on American bottled drinks, protein powders and cooking measurements, and it explicitly avoids silently mixing in the UK figure.
Knowing common ml to oz conversions by heart saves a lot of round trips to a calculator. A US cup is 8 fl oz, or about 236.59 ml. A US pint is 16 fl oz, or about 473.18 ml. A standard US soda can is 12 fl oz, or about 354.88 ml. These benchmarks are useful for reading nutrition labels, following a US recipe with metric kitchen tools, or checking whether a supplement scoop or baby bottle marked in ml matches the oz figure quoted elsewhere.
When to use it
- Converting a US recipe written in fluid ounces or cups into the milliliters your measuring jug actually shows.
- Checking how many US fl oz are in a 500 ml or 1 liter water bottle before travel or gym use.
- Comparing a supplement or medicine dose printed in ml against instructions given in fl oz.
- Reading US nutrition labels (which use fl oz) when you normally think in metric milliliters, or vice versa.
How to use the ML to OZ Converter
- Type the number of milliliters into the Milliliters (ml) box.
- Read the matching US fluid ounces value, which fills in automatically.
- To convert the other way, type a value into the US fluid ounces box instead and the ml figure updates.
- Use Copy result to save the converted figure, or check the reference table below for common bottle and cup sizes.
Formula & method
Worked examples
Convert 250 ml (a small glass of water) to US fluid ounces.
- Start with the value in milliliters: 250 ml.
- Use the rule fl oz = ml / 29.5735295625.
- 250 / 29.5735295625 = 8.4535 (rounded to 4 decimals).
- So 250 ml is about 8.45 US fl oz.
Result: 250 ml = about 8.4535 US fl oz
Convert 8 US fl oz (one US cup) to milliliters.
- Start with the value in fluid ounces: 8 fl oz.
- Use the rule ml = fl oz x 29.5735295625.
- 8 x 29.5735295625 = 236.588236 (rounded to 6 decimals).
- So 8 fl oz is about 236.59 ml.
Result: 8 US fl oz = about 236.59 ml
Common US fluid ounce sizes converted to ml
| US fl oz | Milliliters (ml) | Common example |
|---|---|---|
| 1 fl oz | 29.57 ml | Small shot |
| 2 fl oz | 59.15 ml | Espresso double shot |
| 4 fl oz | 118.29 ml | Small juice glass |
| 8 fl oz | 236.59 ml | 1 US cup |
| 12 fl oz | 354.88 ml | Standard soda can |
| 16 fl oz | 473.18 ml | 1 US pint |
| 32 fl oz | 946.35 ml | 1 US quart |
| 64 fl oz | 1892.71 ml | Half US gallon |
US fluid ounce vs UK/imperial fluid ounce
| Unit | Equals in ml |
|---|---|
| 1 US fluid ounce | 29.5735295625 ml |
| 1 UK/imperial fluid ounce | about 28.4130625 ml |
| Difference per fl oz | about 1.16 ml |
Common mistakes to avoid
- Mixing up US and UK fluid ounces. The US fl oz (29.5735295625 ml) and the UK/imperial fl oz (about 28.4130625 ml) are not the same. Using the wrong one shifts the result by about 4 percent, which adds up fast on a full bottle or recipe.
- Rounding too early. Rounding the 29.5735295625 ml factor down to "30" before dividing gives a noticeably wrong answer over multiple ounces. Use the full factor and round only the final displayed result.
- Multiplying instead of dividing (or the reverse). To go from ml to oz you divide by 29.5735295625; to go from oz to ml you multiply. Doing the opposite gives a wildly wrong number, not just a slightly off one.
- Assuming fl oz always means volume you can weigh the same way. A fluid ounce measures volume, not weight. Water is close to 1 fl oz per 29.57 g, but thicker liquids like honey or oil weigh more per fl oz, so ml to oz volume conversions should not be used as a weight conversion.
Glossary
- Milliliter (ml)
- A metric unit of volume equal to one thousandth of a liter. Used on most nutrition labels and lab equipment worldwide.
- US fluid ounce (fl oz)
- A US customary unit of volume equal to 29.5735295625 ml, used for drinks, cooking and personal care in the United States.
- UK/imperial fluid ounce
- A different fluid ounce used in the UK and some Commonwealth countries, equal to about 28.4130625 ml, roughly 4 percent smaller than the US fl oz.
- US cup
- A US cooking measure equal to 8 US fluid ounces, or about 236.59 ml.
- Conversion factor
- The fixed number used to convert between two units. For ml and US fl oz the factor is 29.5735295625.
- US pint
- A US customary volume unit equal to 16 US fluid ounces, or about 473.18 ml.
Frequently asked questions
How many oz are in 100 ml?
100 ml is about 3.38 US fluid ounces (100 divided by 29.5735295625). This is a common size for travel-sized bottles.
How many ml are in 1 oz?
1 US fluid ounce equals 29.5735295625 ml, commonly rounded to 29.57 ml.
How many oz is 500 ml?
500 ml is about 16.91 US fluid ounces (500 divided by 29.5735295625), just over 1 US pint.
Is a UK fl oz the same as a US fl oz?
No. A US fluid ounce is 29.5735295625 ml, while a UK/imperial fluid ounce is about 28.4130625 ml, roughly 4 percent smaller.
How many ml is 8 oz?
8 US fluid ounces equals about 236.59 ml, which is exactly 1 US cup.
How do I convert ml to oz without a calculator?
Divide the milliliter value by about 30 for a quick estimate, or by the exact factor 29.5735295625 for a precise US fluid ounce result.