Warfarin Dose Adjustment and INR Management Calculator

Guides warfarin dose adjustment based on current INR, target INR range, time in therapeutic range (TTR), and CYP2C9/VKORC1 pharmacogenomics to optimize anticoagulation with bleeding risk assessment.

Weight
Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Guides warfarin dose adjustment based on current INR, target INR range, time in therapeutic range (TTR), and CYP2C9/VKORC1 pharmacogenomics to optimize anticoagulation with bleeding risk assessment

Each component has a specific meaning:

  • Current INR — The current inr recorded for the scenario being assessed.
  • Target INR range — The target inr range recorded for the scenario being assessed.
  • Time in therapeutic range — The time in therapeutic range recorded for the scenario being assessed.
  • CYP2C9/VKORC1 pharmacogenomics — The cyp2c9/vkorc1 pharmacogenomics recorded for the scenario being assessed.

Note: Interpret the warfarin dosing result against the thresholds and context described above.

How to Use

Enter the current INR, target INR range, time in therapeutic range, CYP2C9/VKORC1 pharmacogenomics for the scenario you are assessing. Guides warfarin dose adjustment based on current INR, target INR range, time in therapeutic range (TTR), and CYP2C9/VKORC1 pharmacogenomics to optimize anticoagulation with bleeding risk assessment. Use the warfarin dosing result to inform your calculation.

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Frequently Asked Questions