A standard bottle of wine contains 750ml (75cl) of wine. The number of glasses you can get from one bottle depends on the size of the pour:

• With a typical serving size of 150ml (5 ounces), you get about 5 glasses per bottle. This is a common standard for home and restaurant servings

• If you pour smaller glasses, such as 125ml, you can get 6 glasses per bottle

• For larger pours, like 175ml (often called a medium pour), you get just over 4 glasses per bottle (about 4.3 glasses)

• Very large pours of 250ml yield about 3 glasses per bottle

In summary:

Pour Size (ml)| Approximate Glasses per 750ml Bottle
---|---
125 ml (small)| 6
150 ml (standard)| 5
175 ml (medium)| ~4.3
250 ml (large)| 3

So, for most occasions, a standard bottle of wine will provide around 5 glasses at a standard 150ml serving size. Adjusting the pour size will increase or decrease the number of glasses accordingly