How much coleslaw for 40 people in a buffet-style?

For a buffet-style serving, plan on about 1/4 to 1/2 cup of coleslaw per person. For 40 people, you would need approximately 10 to 20 cups of coleslaw, which translates to about 2.5 to 5 quarts. Adjust the amount based on the overall menu and whether coleslaw is a main side dish or one of several options.