The number of ounces in a standard pitcher of beer depends on the size of the pitcher. Restaurant suppliers sell beer pitchers that have capacities of 32 ounces, 48 ounces or 60 ounces of beer, with most bars and restaurants using 48- or 60-ounce pitchers.
There are 12 ounces in the standard cup of beer sold at bars and restaurants. Thus, a 32-ounce pitcher holds about 2 2/3 standard cups of beer. A 48-ounce pitcher holds about 4 cups of beer, and a 60-ounce pitcher holds about 5 cups of beer. It is easy to underestimate alcohol intake when drinking beer from a pitcher, so caution is warranted when consuming alcohol in this manner.