wine being poured into a wine glass from a wine box
How Many Glasses Of Wine Fit Into A Standard Box?
Most boxed wine contains 3 liters, or four 750-milliliter bottles. In the U.S., a standard glass of wine is 5 ounces (about 147 millimeters), meaning a 3-liter box has 20 glasses.
Also popular are 5-liter boxes (about 33 glasses), but you can also find smaller packages (around 1 liter) to extra-large, party-ready boxes (10 liters, or over 13 bottles).
Note that serving sizes can vary from one brand to the next, and that your glass might be a little heavier than 5 ounces, meaning your box will supply fewer but larger glasses.