30 ounces is equal to 3.75 cups. To convert ounces to cups, you need to know that 1 cup is equivalent to 8 ounces. Therefore, to find out how many cups are in 30 ounces, you simply divide 30 by 8. The calculation is as follows: 30 รท 8 = 3.75. So, 30 ounces is equal to 3.75 cups. This conversion is useful in cooking and baking, where precise measurements are often required.