Insulin Dose Calculator

Calculate estimated rapid-acting insulin doses for blood sugar correction and carbohydrate coverage.

Enter Values

Current Blood Sugar (mg/dL)

Target Blood Sugar (mg/dL)

Correction Factor (1 unit lowers BS by...)

Carbohydrates to Eat (g)

Carb Ratio (1 unit for X grams)

Enter values above and click Calculate to see your result.

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Total Dose = ((Current BS - Target) / Correction) + (Carbs / Ratio)

Combines the insulin needed to bring down high blood sugar and the insulin required to cover a meal.

BS 180, Target 100, Corr 40, Carbs 60, Ratio 15 -> ((180-100)/40) + (60/15) = 2 + 4 = 6 units.

The Correction Factor (or Sensitivity Factor) is how many mg/dL 1 unit of insulin will lower your blood sugar.

The Carb Ratio is the number of grams of carbohydrates that 1 unit of insulin will cover in a meal.

No, this logic is typically used for rapid-acting or short-acting "bolus" insulin before meals or for corrections.

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I can help you understand the insulin dose calculator formula, interpret your results, and answer follow-up questions.

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Corrected calcium for hypoalbuminemia.

Serum anion gap for metabolic acidosis.

CrCl for kidney function and drug dosing.

IV flow rate in gtt/min.

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