Glasgow-Blatchford Bleeding Score Calculator (Upper GI Bleed)
The Glasgow-Blatchford Bleeding Score (GBS) is an admission risk score for acute upper-gastrointestinal bleeding, using blood urea, haemoglobin, systolic blood pressure, pulse, presentation with melaena or syncope, and hepatic or cardiac disease β needing no endoscopy. A score of 0 marks very-low-risk patients.
Quick answer
The Glasgow-Blatchford Bleeding Score is an admission risk score for upper-gastrointestinal bleeding that uses blood urea, haemoglobin (with sex-specific bands), systolic blood pressure, pulse, melaena, syncope, and hepatic or cardiac disease, for a total of 0β23. A score of 0 identifies very-low-risk patients who may be suitable for outpatient management.
Blood results & vitals
Other markers
How to use the Glasgow-Blatchford calculator
- 1Enter the blood results and vitals. Enter the blood urea (mmol/L), haemoglobin (g/dL) with the patientβs sex, and the systolic blood pressure.
- 2Tick the other markers. Tick pulse 100 or more, presentation with melaena, syncope, hepatic disease, and cardiac failure as they apply.
- 3Read the score. The tool totals the points (0β23). A score of 0 marks very low risk; higher scores indicate a greater need for transfusion, endoscopy or other intervention β interpreted with a clinician.
Medical disclaimer: This is general health information, not medical advice. It does not diagnose or treat any condition, and the results are estimates based on public reference formulas. Always consult a qualified doctor about your individual health. If you think you may have a medical emergency, contact your local emergency services immediately.
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Book a consultationFrequently asked questions
What Glasgow-Blatchford score is low risk?β
A score of 0 is the established very-low-risk threshold: in the derivation study and NICE guidance these patients may be considered for outpatient management without urgent inpatient endoscopy. Any score above 0 generally warrants admission and assessment.
Is the Glasgow-Blatchford score the same as the Rockall score?β
No. The Glasgow-Blatchford score uses only admission data (no endoscopy) to predict the need for intervention, whereas the Rockall score includes endoscopic findings and is used mainly to estimate rebleeding and mortality after endoscopy.
Why does the score use blood urea?β
A raised blood urea (out of proportion to creatinine) is a marker of upper-GI blood being digested and absorbed, so it is one of the strongest predictors in the score and is weighted accordingly.
Is my data stored?β
No. The calculator runs entirely in your browser; nothing you enter is sent to a server.
Sources & validation
This calculator reproduces the published Glasgow-Blatchford score, validated for need for intervention / safe outpatient triage in acute upper-GI bleeding (pre-endoscopy).
- Blatchford O, Murray WR, Blatchford M. A risk score to predict need for treatment for upper-gastrointestinal haemorrhage (Lancet 2000;356:1318-1321) β the GBS derivation paper β verified 2026-06-18
- NICE NG12 / CG141 β acute upper-GI bleeding: a Glasgow-Blatchford score of 0 at first assessment supports consideration of outpatient management β verified 2026-06-18
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