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HAS BLED Score Calculator

Work out has bled score instantly with clear inputs, formula shown and shareable results.

About HAS BLED Score Calculator

Adds the HAS-BLED bleeding risk criteria and reports the major bleeding rate seen in the original validation cohort.

Formula

HAS-BLED

One point each for hypertension, abnormal renal function, abnormal liver function, stroke, bleeding history, labile INR, age >65, drugs and alcohol (maximum 9)

Worked example

With the default values below, HAS BLED Score Calculator returns HAS-BLED score of 3. Change any input above and every figure here is recalculated in your browser.

Inputs used

Clinical criteria metaccepts 0–6
2
Age over 65, drugs or alcoholaccepts 0–3
1

Results

HAS-BLED score
3
Risk band
High bleeding risk — review modifiable factors and monitor more closely
Reported major bleeds per 100 patient-years
3.7%
Maximum possible score
9

Step by step

  1. 1Values used
  2. 2HAS-BLED
  3. 3HAS-BLED score= 3
  4. 4Risk band= High bleeding risk — review modifiable factors and monitor more closely
  5. 5Reported major bleeds per 100 patient-years= 3.7
  6. 6Maximum possible score= 9

Assumptions and limits

  • The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Does a high score stop anticoagulation?

No. It flags modifiable bleeding risks and the need for closer review rather than withholding anticoagulation.

What counts as labile INR?

Time in therapeutic range below about 60% on warfarin; it does not apply to direct oral anticoagulants.

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HAS BLED Score Calculator | Calcrivo