Half Liter to Oz
| Amount to halve | Half in fl oz | Half in cups | Half in metric |
|---|---|---|---|
| 1 liter (33.81 fl oz) | 16.91 fl oz | 2.11 cups | 500 mL |
| 500 mL bottle (16.9 oz) | 8.45 fl oz | 1.06 cups | 250 mL |
| 1.5 L bottle (50.72 fl oz) | 25.36 fl oz | 3.17 cups | 750 mL |
| 750 mL wine bottle (25.36 fl oz) | 12.68 fl oz | 1.59 cups | 375 mL (a demi) |
| 2 L bottle (67.63 fl oz) | 33.81 fl oz | 4.23 cups | 1 L |
| 330 mL can (11.16 fl oz) | 5.58 fl oz | 0.70 cup | 165 mL |
Half a liter is 500 milliliters - 16.907 US fluid ounces, or about 2.11 cups. The decimal tail is not rounding error: the US fluid ounce is fixed at exactly 29.5735295625 mL through the 231-cubic-inch gallon, so the half liter comes out at 16.9070 fl oz to four decimals, and every country selling you a bottle agrees on the metric side.
The reason water bottles say 16.9 oz is hiding in plain sight: they are made as 500 mL bottles for metric markets, and 500 mL converts to 16.907 ounces, which packaging rounds to 16.9. The bottle is not almost a half liter - it is the half liter, printed in a different unit system. Same story up and down the shelf: the 750 mL wine bottle, the 1.5 L soda, the 2 L party bottle are all metric-first sizes wearing ounce labels.
Halving stays on the grid here because metric steps are already decimal: half of a liter is 500 mL, half of that is 250 mL (the small bottle), a quarter liter is 250 mL, and the champagne world even bottles the half - 375 mL, called a demi - while a split is the quarter at 187 mL. US kitchen measures sit one conversion away: 500 mL is 2.11 cups, so a recipe asking for a half liter wants 2 cups plus a teaspoon, not 2 cups flat.
How to use
- Find the metric bottle or amount you need to halve in the left column - liters or milliliters.
- Read across for the half in fluid ounces and cups - the two US kitchen and label units.
- For amounts between rows, halve the milliliter number first (half of 700 mL is 350 mL), then convert: divide mL by 29.57 for ounces.
Frequently asked questions
Is 16.9 oz exactly half a liter?
Practically yes, exactly no: a 16.9 fl oz label is 499.79 mL, which is 0.2 mL under the 500 mL half liter - a rounding of 16.907 down to one decimal. The bottles are manufactured as 500 mL metric sizes; the label is the converted number.
How many ounces is half a liter exactly?
16.907 US fluid ounces (500 mL divided by 29.5735295625 mL per ounce). UK recipes using imperial ounces get a different answer - the imperial fluid ounce is 28.41 mL, so a half liter is 17.60 imperial ounces there.
How many 500 mL bottles fill a gallon?
7.57 - a US gallon is 3,785.4 mL, so seven and a half half-liter bottles. The half-gallon jug is the same amount as 3.78 of these bottles, which is why US and metric shelf sizes never line up row for row.
What is a demi or split bottle?
Wine and champagne bottles halve and quarter cleanly: 375 mL is the demi (half bottle, about 12.7 fl oz, two glasses), 187 mL is the split (quarter bottle, one glass). The 750 mL standard itself is a metric rounding of the old fifth - one fifth of a US gallon.
Is drinking half a liter of water enough per day?
No - the common 8x8 target is eight 8-oz glasses, about 1.9 liters, so a half liter covers roughly a quarter of it. Four 500 mL bottles hit the target; the water intake calculator sizes it to your body and activity.
How many cups is half a liter?
2.11 US cups (500 mL against a 236.6 mL cup). For recipes, 2 cups plus about 3 teaspoons lands within a teaspoon of the true half liter - good enough for anything liquid except candy-making and cocktails.