Insulin Dose Calculator
Enter your blood glucose, target, sensitivity factor, and carb intake to calculate your correction and meal bolus insulin doses.
Your Values
How much 1 unit of insulin lowers your glucose.
Grams of carbohydrate covered by 1 unit of insulin.
Set to 0 for a correction-only dose.
Fill in your values and click Calculate Dose
Correction Dose
0.0
units
Meal Dose
0.0
units
Total Dose
0.0
units
Calculation Breakdown
Medical disclaimer: This calculator is for educational purposes only and does not constitute medical advice. Insulin requirements vary by individual. Always confirm doses with your healthcare provider or certified diabetes educator before injecting.
Summary
Enter your blood glucose, target, sensitivity factor, and carb intake to calculate your correction and meal bolus insulin doses.
How it works
- Enter your current blood glucose reading (mg/dL or mmol/L).
- Set your target blood glucose and select your preferred unit.
- Enter your Insulin Sensitivity Factor (ISF) — units of insulin that lower glucose by 1 unit.
- Enter your Carb-to-Insulin Ratio (CIR) — grams of carbohydrate covered by 1 unit of insulin.
- Enter the grams of carbohydrates you plan to eat (leave at 0 for a correction-only dose).
- The calculator displays your correction dose, meal dose, and total recommended dose instantly.
Use cases
- Quickly estimate a correction bolus before a meal when running high.
- Calculate a meal bolus for a known carbohydrate serving.
- Combine correction and meal boluses into one injection.
- Double-check manual dose calculations for accuracy.
- Educate newly diagnosed patients on the sliding-scale concept.
- Support caregivers managing insulin therapy for a family member.
- Use as a reference during continuous glucose monitoring (CGM) reviews.
- Verify pump settings during an insulin pump therapy adjustment.