CalcPairsMilliliters to Fluid Ounces Converter (ml to fl oz)
250 millilitres is 8.453506 US fluid ounces. One US fluid ounce is exactly 29.5735295625 ml, so ml ÷ 29.5735295625 gives fl oz — a standard 750 ml bottle holds 25.36 fl oz, just over three 8-ounce glasses.
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How this conversion works
Bottles, cough syrup, shampoo and cocktail measures live on this pair. Type either side — ml become fl oz, fl oz become ml. A US cup measure is 8 fl oz (236.588 ml), a shot is 1.5 fl oz (44.36 ml), and an airline's 100 ml liquids limit is 3.38 fl oz, which is why travel bottles are marked 3.4.
One caution: the fluid ounce measures volume, not weight — an ounce of feathers-by-weight is a different unit that happens to share the name. The grams-to-ounces page handles weight; this page is liquids only. (The UK fluid ounce exists too, at 28.4130625 ml — about 4% smaller; US measures dominate modern packaging, so this page uses the US unit and says so.)
The exact formula
fluid ounces = millilitres ÷ 29.5735295625
1 US fl oz = 29.5735295625 ml exactly (one 128th of the US gallon). The reverse is millilitres = fluid ounces × 29.5735295625.
Milliliters to Fluid ounces (US) conversion table
| Milliliters (ml) | Fluid ounces (US) (fl oz) |
|---|---|
| 10 | 0.33814 |
| 25 | 0.845351 |
| 50 | 1.690701 |
| 75 | 2.536052 |
| 100 | 3.381402 |
| 150 | 5.072103 |
| 200 | 6.762805 |
| 250 | 8.453506 |
| 300 | 10.144207 |
| 400 | 13.525609 |
| Milliliters (ml) | Fluid ounces (US) (fl oz) |
|---|---|
| 500 | 16.907011 |
| 750 | 25.360517 |
| 1000 | 33.814023 |
Frequently asked questions
How many ml are in a fluid ounce?
29.5735295625 ml exactly, for the US fluid ounce.
Is a fluid ounce the same as an ounce?
No — one measures volume, the other weight. They meet only in water, where 1 fl oz happens to weigh about 1.04 oz.
How many fl oz is 500 ml?
16.907011 fl oz — a common water-bottle size, often labelled 16.9 fl oz.