How much per person? Let's say 8 ounces, i.e., half-pint.
8*90 = 720 ounces
16 ounces = 1 pint.
32 = 1 quart
128 ounces = 1 gallon.
You need 720/128 = 5.625 gallons but that's a small serving.
Better make 10!
To serve punch for 70 people, a general guideline is to prepare about 1 gallon of punch for every 10 guests. This means you would need approximately 7 gallons of punch. To ensure everyone has enough, consider rounding up to about 8 gallons, especially if it's a long event or if punch is the primary beverage being served.
For 100 people, you would typically need around 25 gallons of punch. This estimate is based on each person consuming about 8 ounces (1 cup) of punch. It's always a good idea to have extra on hand just in case.
In order to serve 225 people one 8 ounce serving of fruit punch, 14.06 gallons is needed. The general serving size is 8 ounces. There are 128 ounces in 1 gallon, that is 16 servings per gallon.
One cup is equivalent to 0.0625 gallon. So you will need 1.75 gallons of fruit punch to serve 28 students a cup each. Ed
You will need around 4 gallons of punch to serve 150 people. This amount would only be for one serving per person.
7 1/2 gallons
about 25 gallons
For example, the amount of Hawaiian punch needed to serve ten people if you know how much will serve one person. Or, the daily nutritional value of one serving. Or the diffusion coefficients when you mix Hawaiian punch with water.
The number of people that 40 gallons of chili can serve depends on the serving size. Typically, a serving of chili is about 1 cup, which is roughly 8 ounces. Since there are 128 ounces in a gallon, 40 gallons equals 5,120 ounces. Therefore, if each person receives a cup (8 ounces), 40 gallons of chili can serve approximately 640 people.
A standard serving size for punch is typically around 4 to 6 ounces. With two gallons, which equals 256 ounces, you can expect to serve approximately 42 to 64 servings, depending on the portion size you choose. If you serve 4-ounce portions, you'll get about 64 servings, while 6-ounce servings will yield around 42 servings.
secrets from a caterers kitchen is a book you should read-one thing it talks about is food&beverage amounts because NO ONE can ever know how much ppl will eat or drink but you certainly dont want to run out of food and you dont want to waste your money by getting too much. another good idea is looking up a beverage recipe online and seeing how many ppl it will serve and weighing that against the volume of the beverage ex.http://www.foodnetwork.com/recipes/alton-brown/cape-fear-punch-recipe/index.html
You would need 7.5 gallons to get 120 8 ounce servings.