Laura; Sorry I’m slow in getting back to you. I’ve been on holidays. I don’t know if everyone is using the 4 mmol/ml salt solution, but it’s the standard here. I’ll include the calculations our endo used to double check my calculations. I would assume that they would make the most sense to another endo checking the work. Dr. Dean is the head of Pediatric Endocrinology at the Health Sciences Centre, Manitoba Canada, and a Medical Professor at the university of Manitoba. The atomic weight (1 mol) of Na is 23 g For a 4 mol/L solution, you will need 4 x 23 g = 92 g Na in 1 L of water. Since 5 ml table salt weighs 6 g and contains 2.325 g Na, you will need mL salt = 92 g x 5 ml/ 2.325g = 197.8 mL salt per litre of water. 19.78 ml of table salt is 4 tsp in 100 ml of water The last line is the formula for mixing. The calculations are in case the endo wants to double check. Here they give 1 ml three times a day. this delivers 0.712 grams of salt per day. Hope this helps, and way to go in getting something together for parents. The Dr.s leave us on our own far too much. I know people who weren’t told about the shot or anything about crisis.