What is the Revised Trauma Score?

The RTS is a physiologic scoring system that combines the Glasgow Coma Scale, systolic blood pressure, and respiratory rate. Each is converted to a coded value from 0 to 4, then weighted and summed to produce a continuous score from 0 to 7.84 used to predict survival in trauma patients.

What are the RTS coding weights?

The weighted RTS uses RTS = 0.9368 × GCS code + 0.7326 × SBP code + 0.2908 × RR code. The Glasgow Coma Scale carries the greatest weight because neurological status is the strongest single predictor of trauma outcome.

What RTS value triggers trauma-centre transfer?

An RTS below 11 on the simpler triage version, or a weighted RTS below roughly 7.55 (any abnormality), is commonly used as a threshold to consider transport to a designated trauma centre. Local protocols vary, so follow your service guidelines.

How does RTS relate to survival probability?

Higher scores correlate with higher survival. A weighted RTS of 7.84 reflects normal physiology and very high survival, while scores below 4 reflect severe derangement and markedly reduced survival. RTS is one input to the combined TRISS methodology.

Is my data stored anywhere?

No. The calculation runs entirely in your browser and nothing you enter is transmitted or saved on any server.

Revised Trauma Score (RTS) Calculator

The Revised Trauma Score (RTS) turns three bedside physiologic measurements into a single weighted number that predicts how likely a major-trauma patient is to survive. It is widely used in prehospital triage and trauma registries because it needs only the Glasgow Coma Scale, a blood-pressure cuff, and a respiratory count.

How it works

Each of the three variables is first mapped to a coded value from 0 (worst) to 4 (normal):

Glasgow Coma Scale (GCS): 13–15 → 4, 9–12 → 3, 6–8 → 2, 4–5 → 1, 3 → 0.
Systolic blood pressure (SBP, mmHg): greater than 89 → 4, 76–89 → 3, 50–75 → 2, 1–49 → 1, 0 → 0.
Respiratory rate (RR, breaths/min): 10–29 → 4, greater than 29 → 3, 6–9 → 2, 1–5 → 1, 0 → 0.

The coded values are then combined with their published regression weights:

RTS = 0.9368 × GCS_code + 0.7326 × SBP_code + 0.2908 × RR_code

The maximum (entirely normal physiology) is 0.9368×4 + 0.7326×4 + 0.2908×4 = 7.8408. The Glasgow Coma Scale is weighted most heavily because neurological status is the single strongest predictor of trauma death.

Example and notes

A patient with GCS 10 (code 3), SBP 80 (code 3), and RR 35 (code 3) scores 0.9368×3 + 0.7326×3 + 0.2908×3 = 5.88. Because all three are abnormal, this patient should be evaluated for trauma-centre transfer.

The RTS is a triage and audit tool, not a diagnosis. It assumes a single reliable set of vitals; intubation, sedation, and paralytics distort the GCS and respiratory components, so document those confounders alongside the score.