Insulin Dosage Calculator
Use this free insulin dosage calculator to do the arithmetic for a mealtime and correction insulin dose from your own ratios.
Medical safety notice: This tool performs calculations only and does not establish a safe or appropriate treatment or dose. Verify all units and product instructions with a licensed clinician or pharmacist before acting on the result.
How the insulin dosage calculator works
Meal dose = carbs ÷ insulin-to-carb ratio. Correction = (current glucose − target) ÷ correction factor. Subtract insulin on board. Use only the ratios your care team gave you.
Frequently asked questions
Can I rely on this for dosing?
No. It is arithmetic only and not medical advice. Always follow your clinician’s instructions and check your meter, pump or app.
Results are estimates for general information only. They are not a substitute for professional advice where applicable. Found a mistake? Report an error.