Warfarin Dose Adjustment Calculator
Estimate warfarin dose adjustments based on current INR values using proportional adjustment guidelines.
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
Results
Suggested Weekly Dose
35 mg
Suggested Daily Dose
5 mg
How to Use This Calculator
- Enter Current INR, Target INR, and Current Weekly Dose.
- Review Suggested Weekly Dose (mg) and Suggested Daily Dose (mg).
- Use Dose Change (%) and Current Daily Dose (mg) to inform your decision.
How the result changes with Current INR
| Current INR | Suggested Weekly Dose | Suggested Daily Dose |
|---|---|---|
| 1.45 | 40.25 mg | 5.75 mg |
| 3.82 | 31.5 mg | 4.5 mg |
| 6.67 | 28 mg | 4 mg |
| 9.05 | 28 mg | 4 mg |
What each input means
- Current INR
- Your most recent INR lab result.
- Target INR
- Your prescribed target INR value (typically 2.0–3.0 for most indications).
- Current Weekly Dose
- Your total current warfarin dose per week in mg.
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