Insulin Dose Calculator
Calculate insulin correction and meal bolus doses using your prescribed correction factor and insulin-to-carb ratio. This educational tool demonstrates the standard formulas used in diabetes management for rapid-acting insulin dosing.
Insulin dosing for mealtime management involves two components: a correction dose to bring elevated blood glucose toward target, and a meal dose to cover carbohydrates being consumed. The correction dose is calculated by dividing the difference between current and target blood glucose by the correction factor (also called insulin sensitivity factor or ISF). The meal dose divides the grams of carbohydrates by the insulin-to-carb ratio.
These ratios are individualized and prescribed by an endocrinologist or diabetes care team. Common starting correction factors range from 25-50 mg/dL per unit, and insulin-to-carb ratios from 5-20 grams per unit, but these vary widely based on body weight, insulin resistance, time of day, and individual physiology. Many patients use different ratios for different meals.
CRITICAL DISCLAIMER: This calculator is for educational purposes only. Insulin is a dangerous medication when dosed incorrectly. Too much insulin causes hypoglycemia, which can lead to seizures, loss of consciousness, and death. Too little insulin causes hyperglycemia and potential diabetic ketoacidosis. NEVER use this calculator as a substitute for the guidance of your healthcare provider. Only use correction factors and insulin-to-carb ratios that have been prescribed specifically for you.