Insulin Dose Calculator
This insulin dose calculator estimates a weight-based total daily dose (TDD), splits it into basal and mealtime bolus, and derives the sensitivity factor (1800 rule) and an optional correction dose. It is educational and does not replace your prescribed regimen.
Calculator
LiveEducational tool, not medical advice. Verify every dose against the prescription and your institutional protocol — a licensed clinician is responsible for the final dose.
Estimates only. Do not change your insulin without your prescriber — dosing errors can cause severe hypoglycemia or hyperglycemia.
Enter values to see your result.
How to Use the Calculator
- Enter body weight in kilograms.
- Adjust the units-per-kg factor if your regimen differs from 0.5.
- Optionally enter current and target blood glucose for a correction estimate.
- Review the total daily dose, basal/bolus split, and sensitivity factor.
What the Result Means
These are educational starting estimates: a weight-based total daily dose split into basal and mealtime bolus, with a sensitivity factor and optional correction. They do not replace an individualized, prescriber-directed regimen — insulin errors can cause severe hypoglycemia or hyperglycemia.
When to Use This Calculator
- Understanding a weight-based starting regimen
- Estimating basal/bolus split and sensitivity factor
- Learning how a correction dose is derived
Frequently Asked Questions
How is total daily insulin calculated by weight?
A common starting estimate is 0.5 units per kilogram per day (range roughly 0.2–1.0). Total daily dose = weight in kg × the units-per-kg factor.
What is the insulin sensitivity factor (1800 rule)?
The sensitivity factor estimates how far 1 unit of rapid-acting insulin lowers blood glucose: ISF = 1800 ÷ total daily dose, in mg/dL per unit.
Can I change my insulin based on this calculator?
No. These are educational estimates only. Insulin dosing must be individualized by your prescriber — errors can cause severe hypoglycemia or hyperglycemia.
References & Guidelines
- American Diabetes Association. Standards of Care in Diabetes (current year).