Health Tools Hub

Understanding Insulin Dosage Calculations

Learn how to safely calculate insulin doses for better diabetes management

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Insulin Sensitivity Factor (ISF)

ISF tells you how much 1 unit of insulin will lower your blood sugar. Essential for correction doses.

Key Points:

Typically 30-100 mg/dL per unit
Use the "1800 rule" for rapid-acting insulin
Work with your healthcare provider to determine yours
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Insulin-to-Carb Ratio (ICR)

ICR tells you how many grams of carbs 1 unit of insulin will cover at meals.

Key Points:

Typically 1:8 to 1:25 (1 unit covers 8-25g carbs)
Use the "500 rule" for rapid-acting insulin
May vary by meal time and activity level
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Blood Sugar Targets

Target ranges help determine when correction doses are needed.

Target Ranges:

Before meals: 80-130 mg/dL
After meals: Under 180 mg/dL
Individualized based on your health status
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Insulin Stacking Prevention

Taking insulin before the previous dose has finished working can cause dangerous low blood sugar.

Prevention Tips:

Wait for insulin action to finish
Rapid-acting: 3-5 hours duration
Consider insulin-on-board when dosing
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Safety Guidelines

Always Monitor

Check blood sugar 2-4 hours after insulin doses to ensure safety and effectiveness.

Carry Glucose

Always have fast-acting carbs available to treat potential low blood sugar episodes.

Track Everything

Log insulin doses, carbs, blood sugars, and activity to identify patterns.

Frequently Asked Questions

Common questions about insulin dosage calculations and diabetes management

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Calculation Accuracy

How accurate are these insulin dose calculations?

Our calculations use established medical formulas (like the 1800 and 500 rules) that are widely accepted in diabetes care. However, individual needs vary greatly.

Always work with your healthcare provider to determine personal ratios

Unknown Ratios

Can I use this if I don't know my ISF or ICR?

The calculator provides estimates based on your body weight using standard formulas, but these should only be starting points.

Work with your diabetes educator or endocrinologist for accurate ratios
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Emergency Situations

What should I do if my blood sugar is very high or low?

Below 70 mg/dL: Treat the low first before considering insulin
Above 300 mg/dL: Check for ketones and contact your healthcare provider
Never rely solely on this calculator in emergency situations
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Insulin Stacking

How do I avoid insulin stacking?

Wait for your previous insulin dose to finish working
Rapid-acting insulin works for 3-5 hours
The calculator warns you if there's potential stacking risk

Medical Disclaimer

**Medical Disclaimer:** The information provided by this calculator is for educational and informational purposes only and should not be considered as medical advice. Always consult with a qualified healthcare provider before making any decisions about your health or treatment. This tool is not intended to diagnose, treat, cure, or prevent any disease.