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HAS-BLED Bleeding Risk Score Calculator — result sheet
Add the HAS-BLED bleeding-risk components with separate renal, liver, age, INR, medication, and alcohol inputs and a modifiable-risk reminder.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: HAS-BLED = hypertension (1) + abnormal renal function (1) + abnormal liver function (1) + stroke (1) + bleeding history/predisposition (1) + labile INR (1) + age >65 (1) + drugs (1) + alcohol (1), with renal and liver each able to contribute one point. Maximum 9.
The calculator turns documented HAS-BLED components into a score and highlights the common use of a higher score as a prompt to review modifiable bleeding risks. It does not tell a person to stop anticoagulation or replace a prescriber’s assessment.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Age — years; minimum 18; maximum 120
- Uncontrolled hypertension in the scoring convention — 2 choices
- Abnormal renal function documented — 2 choices
- Abnormal liver function documented — 2 choices
- Previous stroke — 2 choices
- Bleeding history or predisposition — 2 choices
- Labile INR in a warfarin context — 2 choices
- Drugs that increase bleeding risk — 2 choices
- Alcohol excess in the scoring convention — 2 choices
Worked example
| Input | Value |
|---|---|
| Age | 50 |
| Uncontrolled hypertension in the scoring convention | no |
| Abnormal renal function documented | no |
| Abnormal liver function documented | no |
| Previous stroke | no |
| Bleeding history or predisposition | no |
| Labile INR in a warfarin context | no |
| Drugs that increase bleeding risk | no |
| Alcohol excess in the scoring convention | no |
HAS-BLED = 0 points for the supplied example inputs.
Assumptions and limits
- The chosen definitions match the approved HAS-BLED version and local clinical pathway.
- Age contributes one point when it is greater than 65 years.
- Renal and liver abnormalities are entered separately and can each contribute one point.
- Drugs and alcohol are represented as the documented score components, not as informal lifestyle judgments.
- Labile INR is relevant to the anticoagulation context in which that component is defined.
- The score is a risk flag and not an exact prediction of an individual’s future bleeding.
- A higher result should prompt review of reversible factors and follow-up, not automatic withholding of beneficial therapy.
- The calculator does not diagnose organ disease, quantify alcohol use, choose an anticoagulant, or set a target INR.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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