Insulin Dose Calculator

An educational tool to understand how endocrinologists estimate basal and correction insulin doses using standard clinical formulas.

Important Medical Disclaimer

This calculator is for educational purposes only. It demonstrates the mathematical formulas doctors use to estimate insulin. Do not use this tool to self-prescribe or adjust your insulin doses. Insulin therapy requires strict medical supervision. Always consult your endocrinologist or healthcare provider before making any changes to your medication.

Understanding Insulin Dose Calculations

What is this calculator?

An insulin dose calculator is an educational tool that demonstrates the mathematical formulas endocrinologists use to estimate a patient's daily insulin requirements. It breaks down the complex process of insulin therapy into understandable components: basal (background) insulin and correction (bolus) insulin.

Doctors use these calculations as a starting point. They then adjust the doses based on continuous glucose monitoring, lifestyle factors, and individual metabolic responses.

The Formulas Used

Calculation Formula Purpose
Total Daily Dose (TDD) Weight (kg) × Multiplier Estimates total insulin needed per day. Multiplier is typically 0.5 for Type 1 and 0.2 for Type 2.
Basal Dose TDD × 0.5 Estimates the long-acting insulin needed to maintain baseline blood sugar.
Sensitivity Factor (ISF) 1800 ÷ TDD The "1800 Rule". Shows how much 1 unit of rapid insulin drops blood sugar (mg/dL).
Correction Dose (Current BG - Target BG) ÷ ISF Calculates the extra insulin needed to bring high blood sugar down to target.

Frequently Asked Questions

How is basal insulin dose calculated?

Basal insulin is typically estimated by calculating the Total Daily Dose (TDD) based on body weight, then dividing it by two. For Type 1 diabetes, the multiplier is often 0.5 units/kg. For Type 2 diabetes, it is often 0.2 to 0.3 units/kg.

What is the 1800 rule for insulin?

The 1800 rule is used to calculate the Insulin Sensitivity Factor (ISF) for rapid-acting insulin. You divide 1800 by your Total Daily Dose of insulin. The result tells you how many mg/dL one unit of insulin will lower your blood sugar.

Can I use this calculator to change my insulin dose?

No. This calculator is strictly for educational purposes to help you understand the math behind insulin dosing. Never adjust your insulin without direct supervision from your healthcare provider.

⚕️ Medical Disclaimer

This insulin dose calculator is for educational and informational purposes only. It is not a diagnostic or prescribing tool. Insulin therapy is highly individualized and carries significant risks if managed incorrectly. Always consult with a qualified endocrinologist or healthcare provider for personal medical advice, diagnosis, or treatment.