MyCalcBuddy

HAS-BLED Score Calculator

Assess major bleeding risk in patients on anticoagulation therapy for atrial fibrillation.

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Important Health Disclaimer

This calculator provides general health information based on standard medical formulas and WHO guidelines. Results are for informational and educational purposes only and should not be considered as professional medical advice, diagnosis, or treatment recommendations.

For health concerns, medical conditions, fitness plans, or dietary decisions, please consult with qualified healthcare professionals, licensed physicians, registered dietitians, or certified fitness trainers who can evaluate your individual health status and medical history.

Individual health needs vary significantly. These calculations are general estimates and may not be appropriate for everyone, especially those with existing medical conditions, pregnant women, children, or elderly individuals.

Not a substitute for professional medical advice

HAS-BLED Criteria

Select all risk factors present:

HAS-BLED Score

0

Low Risk

Bleeding Risk/Year
1.13%
Risk Category
Low Risk

Clinical Recommendation

Low bleeding risk. Anticoagulation can be initiated with routine monitoring.

Score Interpretation

  • 0: Low risk (1.13%/year)
  • 1-2: Moderate risk (1-2%/year)
  • ≥3: High risk (>3%/year) - caution advised

Modifiable Risk Factors

Hypertension, labile INR, drugs, and alcohol are modifiable. Addressing these can reduce bleeding risk.

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sources

  • •World Health Organization (WHO) — Global health metrics, disease classification, and nutritional standards. who.int
  • •Centers for Disease Control and Prevention (CDC) — Health statistics, BMI guidelines, and disease prevention data. cdc.gov
  • •National Institutes of Health (NIH) — Medical research, clinical guidelines, and health calculators. nih.gov
  • •Mayo Clinic — Clinical health information, disease reference, and wellness guidance. mayoclinic.org

For a complete list of all references used across the site, visit our full sources page.

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Editorial Note

MyCalcBuddy Editorial Team

This page is maintained as an educational calculator reference.

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Formula Source: WHO Health Metrics Standards

by World Health Organization

🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.