Correction Insulin Dose Calculator
Enter your current blood glucose, target glucose, and insulin sensitivity factor to calculate how many units of insulin are needed to return to your target range.
Your Values
How much 1 unit of insulin lowers your blood glucose.
Fill in your values and click Calculate Correction Dose
units of rapid-acting insulin
Formula 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 current blood glucose, target glucose, and insulin sensitivity factor to calculate how many units of insulin are needed to return to your target range.
How it works
- Select your blood glucose unit (mg/dL or mmol/L).
- Enter your current blood glucose reading from your meter or CGM.
- Enter your personal target blood glucose (e.g., 100 mg/dL or 5.6 mmol/L).
- Enter your Insulin Sensitivity Factor — the number of blood glucose units one unit of insulin lowers you by.
- Click Calculate to see your correction dose in insulin units.
- If your current glucose is at or below target, the correction dose is zero — no correction needed.
Use cases
- Quickly estimate a correction bolus when blood glucose is running high before or between meals.
- Double-check a manual correction dose calculation for accuracy.
- Educate newly diagnosed patients on how the correction formula works.
- Support caregivers managing insulin therapy for a family member.
- Use alongside a CGM reading to decide whether to stack a correction.
- Verify pump basal corrections during a pump therapy review.