- 1Sep 14, '07 by sirI, MSN, APRN, NP AdminHello, nightmare
To convert mmol/l of glucose to mg/dl, multiply by 18.
Example: 4 mmol/l x 18 = 72 mg/dl
To convert mg/dl of glucose to mmol/l, divide by 18.
Example: 125 mg/dl / 18 = 6.94 mmol/l
Here is a glucose converting site: