Multiple choice general knowledge science & technology The average adults empty stomach has the volume of 1/5 of a cup. True False Reveal answer Fill a bubble to check yourself A Correct answer Explanation An empty adult stomach has a very small volume, approximately 50-100 milliliters (about 1/5 to 1/3 of a cup). The stomach is highly distensible and can expand to hold about 1-1.5 liters of food when full.