HAS-BLED Score

Estimates major bleeding risk for patients on anticoagulation.

Bleeding risk on anticoagulation

Patient parameters

Adjust values, then click Calculate.

Uncontrolled hypertension

Abnormal renal function

Abnormal liver function

Prior stroke

Prior major bleeding

Labile INR on warfarin

Age > 65

Concomitant antiplatelet/NSAID

Excess alcohol use

Results

HAS-BLED score: 0 points

What this calculator does

HAS-BLED highlights modifiable bleeding risk factors in patients considered for anticoagulation. It does not contraindicate anticoagulation but prompts risk mitigation.

Formula and variables

Displayed formula: Bleeding risk on anticoagulation

The engine evaluates: HAS-BLED score (points). Variable names match the input field keys so you can trace each step from entry to output.

How to use this tool

1. Open the HAS-BLED Score and enter your values using the units shown beside each field.
2. Review that inputs are within the typical physiological range before you calculate.
3. Read the result together with the interpretation notes below and your local clinical context.

How to interpret the result

Scores ≥3 indicate high bleeding risk—address hypertension, labile INR, medications, and alcohol; monitor closely rather than automatically withholding therapy.

Clinical context

Cardiovascular calculations support assessment but never replace ECG, imaging, troponin trends, or emergent reperfusion pathways when STEMI is suspected.

Limitations and disclaimer

This tool supports education and clinical triage only. It does not replace professional medical advice, diagnosis, or treatment. Reference ranges vary by laboratory, age, pregnancy status, and comorbidity. Always confirm critical decisions with institutional protocols and qualified clinicians.