750 ml is 25.36 US fluid ounces — call it 25.4 oz, or about 3⅕ cups. In the UK, where the fluid ounce is slightly smaller, the same bottle is 26.4 imperial fluid ounces.
The reason this exact figure gets searched so often is that 750 ml is the standard wine and spirits bottle almost everywhere in the world. It is not a round number in ounces, which is precisely why nobody remembers it.
| Millilitres | US fl oz | Imperial fl oz | What it usually is |
|---|---|---|---|
| 50 ml | 1.69 | 1.76 | Miniature spirits bottle |
| 100 ml | 3.38 | 3.52 | Liquids airport limit |
| 187.5 ml | 6.34 | 6.60 | Single-serve wine ("piccolo") |
| 250 ml | 8.45 | 8.80 | Metric cup |
| 330 ml | 11.16 | 11.61 | Standard beer/soda bottle |
| 355 ml | 12.00 | 12.49 | US 12 oz can |
| 375 ml | 12.68 | 13.20 | Half bottle of wine |
| 500 ml | 16.91 | 17.60 | Small water bottle |
| 700 ml | 23.67 | 24.64 | EU spirits bottle |
| 750 ml | 25.36 | 26.40 | Standard wine bottle |
| 1000 ml (1 L) | 33.81 | 35.20 | One litre |
| 1500 ml | 50.72 | 52.79 | Magnum |
Fluid ounces are not weight ounces
This is the single biggest source of confusion in the conversion. A fluid ounce measures volume; an ounce measures weight. They are different quantities that unfortunately share a name.
For 750 ml:
- Volume: 25.36 US fluid ounces
- Weight, if it is water: 750 grams, which is 26.46 weight ounces (1.65 lb)
- Weight, if it is wine: slightly less than water, since alcohol is less dense
So a 750 ml bottle is "25.4 fl oz" of liquid but weighs about "26.5 oz" — two different numbers that both look like ounces. When a label or recipe says "oz," check whether it is measuring how much space something takes up or how heavy it is.
Why wine bottles are 750 ml
The 750 ml bottle is now the global standard, and the reason is regulatory rather than traditional. Before 1979, US bottles came in imperial-derived sizes, the most common being the "fifth" — one fifth of a US gallon, which is 757.08 ml, or 25.6 US fluid ounces.
When the US moved to metric labelling for wine and spirits around 1979–1980, 750 ml was adopted as the nearest round metric size to the fifth. The difference is only 7 ml, about a quarter of a fluid ounce, which is why the old name survived in American usage long after the bottles changed.
Europe had already standardised on 750 ml, so the change aligned the two markets. The one notable holdout is spirits in parts of Europe, where 700 ml (23.67 fl oz) is the common bottle — worth knowing if you are comparing prices across borders, since a 700 ml bottle is 6.7 percent less liquid than a 750 ml one.
How many glasses is 750 ml?
It depends on the pour, and the standard pour is smaller than most people assume:
- At a 5 oz (148 ml) pour — the US standard drink for wine — a 750 ml bottle gives 5 glasses
- At a 6 oz (177 ml) pour, about 4.2 glasses
- At a generous 8 oz (237 ml) pour, about 3.2 glasses
The five-glass figure is the one used on nutrition labels and in health guidance, because the US defines a standard drink as 5 fl oz of wine at roughly 12% ABV.
For catering, the arithmetic runs the other way: a case of 12 bottles pours 60 standard glasses, so plan roughly one bottle per five guests per round.
US vs imperial fluid ounces
The two fluid ounces differ by about 4 percent, and the US one is the larger:
- US fluid ounce: 29.5735 ml
- Imperial fluid ounce: 28.4131 ml
That means 750 ml is 25.36 US fl oz but 26.40 imperial fl oz — the smaller unit gives a bigger count for the same liquid.
The confusing part is that the imperial system’s larger units run the other way: an imperial pint is 20 imperial fl oz (568 ml) while a US pint is 16 US fl oz (473 ml), so a UK pint is about 20 percent bigger than a US one despite the fluid ounce being smaller. The pint and gallon were redefined in 1824; the ounce count per pint changed with them.
When a recipe or label gives fluid ounces without saying which, the origin is the best clue: American sources mean US fluid ounces, older British ones mean imperial.
Frequently Asked Questions
How many ounces is 750 ml?
25.36 US fluid ounces, or 26.40 imperial fluid ounces. A US fluid ounce is 29.5735 ml, so 750 ÷ 29.5735 = 25.36.
How many cups is 750 ml?
3.17 US cups, since a US cup is 236.59 ml. In 250 ml metric cups it is exactly 3 cups.
How many glasses of wine are in a 750 ml bottle?
Five, at the US standard 5 fl oz pour. At a more generous 6 oz pour you get about 4.2 glasses, and at 8 oz about 3.2.
Is 750 ml the same as a fifth?
Almost. A US fifth was one fifth of a gallon — 757.08 ml, or 25.6 fl oz. When US spirits labelling went metric around 1980, 750 ml replaced it as the nearest round size, a difference of about 7 ml.
Does 750 ml weigh 750 grams?
For water, yes — a millilitre of water weighs a gram, so 750 ml is 750 g (26.46 weight ounces). Wine and spirits are slightly lighter than water because alcohol is less dense.
Is 750 ml bigger than 700 ml?
Yes, by 50 ml or about 1.7 US fluid ounces — 7.1 percent more liquid. Both sizes are sold as standard spirits bottles in different markets, so it is worth checking when comparing prices.