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Clinical decision support
HAS-BLED bleeding risk score

HAS-BLED Bleeding Risk Score Calculator

Calculate HAS-BLED bleeding risk score for patients with atrial fibrillation being considered for anticoagulation.
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HAS-BLED calculator

Use this HAS-BLED calculator to structure bleeding risk review in anticoagulated or anticoagulation-eligible atrial fibrillation patients. It highlights modifiable bleeding risk factors that need follow-up.

years

Uncontrolled hypertension

Abnormal renal function

Abnormal liver function

Prior stroke/TIA

Bleeding history or predisposition

Labile INR

Antiplatelet/NSAID use

Alcohol excess

HAS-BLED score

0 / 9

Lower bleeding risk range.

Age point

Absent

Age >65 years scores one point.

Clinical decision support only. Verify unusual values, follow local guidelines, and interpret calculations alongside the full clinical picture.

Equations used on this page

HAS-BLED = hypertension + abnormal renal function + abnormal liver function + stroke + bleeding history + labile INR + elderly age >65 + drugs + alcohol. Abnormal renal/liver and drugs/alcohol can each contribute separate points.

Clinical notes

A high HAS-BLED score should prompt closer review and correction of modifiable risk factors rather than automatic withholding of anticoagulation.

Use alongside thromboembolic risk assessment, renal function, medication review, fall risk, and shared decision-making.

References

Pisters R, Lane DA, Nieuwlaat R, et al. HAS-BLED score

These calculators are designed for clinician decision support and SEO-friendly public education. Verify results against the original method and the patient context before making decisions.