Physiology Stool osmotic gap is calculated by using the formula: A 2 x (stool + stool ) B 2 x (stool + stool ) C 2 x (stool + stool ) D 2 x (stool + stool ) 💡 Explanation Stool osmotic gap is calculated by using the formula: ✓ Correct Answer: A. 2 x (stool + stool )