Warfarin Dosing Calculator
Get dosing guidance based on current INR.
Warfarin Dosing Form
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Understanding Your Results
Warfarin dosing adjustments are based on current INR and target range (usually 2.0–3.0). Follow institutional protocols and recheck INR per guidance.
- <2.0 (Subtherapeutic): Increase weekly dose by 0–15% depending on how low the INR is.
- 2.0–3.0 (Therapeutic): Continue current dose. Recheck per protocol.
- 3.1–4.0 (Supratherapeutic): Decrease dose or hold. Recheck in 1–3 days if >4.0.
- >4.0: Hold dose. Consider low-dose vitamin K if bleeding. Recheck in 24h.
Learn More
- How to Interpret Warfarin Dosing Results
- Living With Warfarin Dosing
- Warfarin Dosing Diagnosis and Tests
- Warfarin Dosing Myths and Facts
- Warfarin Dosing Risk Factors
- Warfarin Dosing Symptoms and Causes
- Warfarin Dosing Treatment Options
- Warfarin Dosing vs Direct Oral Anticoagulants
- What Is the Warfarin Dosing?
- When to See a Doctor About Warfarin Dosing
Frequently Asked Questions
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Medical Disclaimer: This calculator is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for personalized guidance.