Insulin Dose Calculator: Correction and Meal Bolus
Learn how to calculate insulin doses for meals and blood sugar corrections. Understand insulin-to-carb ratios, correction factors, and safe dosing practices.
How is Insulin Dose Calculated?
Insulin dosing involves two components: a meal bolus (to cover carbohydrates eaten) and a correction bolus (to bring elevated blood glucose back to target). Correct dosing is critical — too little leads to hyperglycemia, too much causes dangerous hypoglycemia.
💉 Insulin Dose Calculator
Use our free calculator for instant, accurate results.
📐 Formula
Total Dose = (Carbs / ICR) + (Current BG − Target BG) / CF
ICR = Insulin-to-Carb Ratio (units per grams of carbs). CF = Correction Factor (how many mg/dL one unit of insulin lowers BG). Values are set by your doctor.
📝 Worked Example
Eating 60g carbs, ICR = 1:15. BG = 200 mg/dL, Target = 120, CF = 40:
Meal bolus = 60/15 = 4 units
Correction = (200−120)/40 = 2 units
Total = 6 units
📝 How to Use the Calculator
❓ FAQ
Is this calculator a substitute for medical advice?
No. Always use insulin dosing values set by your healthcare provider. This tool is for educational and estimation purposes only.
What is the 1700 rule?
Divide 1700 by your total daily dose (TDD) of insulin to estimate your correction factor (how much 1 unit lowers blood glucose).
Veer Kumavat
Founder & AuthorVeer is a 14-year-old student from Nashik, Maharashtra, who built SciFi Calculators to help students worldwide master STEM subjects. He is passionate about making complex science and math problems accessible through intuitive digital tools.