HAS-BLED Score Calculator

How to calculate HAS-BLED score calculator?

Assign 1 point for each present risk factor in the HAS-BLED checklist and add the points to get the total score. Higher totals indicate greater 1-year bleeding risk.

Key formula: HAS-BLED = Hypertension + Abnormal renal/liver function + Stroke + Bleeding tendency + Labile INR + Age >65 + Concomitant drugs + Alcohol

Using the HAS-BLED score calculator calculator: an example

Example patient: 72-year-old with hypertension, prior stroke and labile INR; other risk factors absent.

Step-by-step calculation:

1. Hypertension: Yes → 1 point; Age >65: Yes → 1 point. (Subtotal = 2)
2. Prior stroke: Yes → 1 point; Labile INR: Yes → 1 point. (Subtotal = 4)
3. Abnormal renal/liver function, bleeding tendency, concomitant drugs, alcohol: all No → 0 points. (Subtotal = 4)
4. Total HAS-BLED score = 4 → indicates a moderate-to-high 1-year bleeding risk and the need for careful review and monitoring.

Frequently Asked Questions

What does the HAS-BLED score range mean?

Scores 0–2 generally indicate lower bleeding risk; a score of 3 or more signals increased risk and prompts closer monitoring and review of modifiable factors.

Should the HAS-BLED score alone determine anticoagulation?

No. HAS-BLED identifies bleeding risk factors and informs monitoring; treatment decisions should combine bleeding risk with stroke risk and clinical judgment.

Can any HAS-BLED factors be modified to reduce risk?