Injury Severity Score
Minor injury, low mortality risk
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Evidence-based calculations Used in clinical settings worldwide Regular monitoring recommended
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Why: This calculation helps assess important health parameters for clinical and personal wellness tracking.
How: Enter your values above and the calculator will apply validated formulas to compute your results.
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🚑 Sample Trauma Scenarios
📋 AIS Scale Reference
🧠Head/Neck
Brain, cervical spine, skull
👤Face
Facial bones, oral cavity, ears, eyes
🫁Chest
Thorax, lungs, heart, thoracic spine
🫃Abdomen/Pelvic Contents
Abdominal organs, lumbar spine
🦵Extremities/Pelvic Girdle
Limbs, pelvis structure
🔥External/Other
Skin, burns, hypothermia
💓 Physiologic Parameters (for RTS/TRISS)
Injury Severity Score
Visual Analysis
📊 ISS Severity Gauge
📈 AIS by Body Region
🎯 Injury Distribution Profile
Clinical Recommendations
Step-by-Step Calculation
ISS = Sum of squares of the 3 highest AIS scores from different body regions
Head/Neck: AIS 0 (No injury to this region)
Face: AIS 0 (No injury to this region)
Chest: AIS 0 (No injury to this region)
Abdomen: AIS 0 (No injury to this region)
Extremities: AIS 0 (No injury to this region)
External: AIS 0 (No injury to this region)
No injuries recorded
ISS: 0 - Minor (1-8)
Major Trauma (ISS >15): No
Expected Mortality: <1%
GCS: 15, SBP: 120 mmHg, RR: 16/min
RTS = 7.841 (Range 0-7.84)
ISS Severity Reference
| ISS Range | Severity | Mortality | Trauma Center |
|---|---|---|---|
| 1-8 | Minor | <1% | Not typically required |
| 9-15 | Moderate | 1-2% | Consider based on injury pattern |
| 16-24 | Serious | 5-10% | Trauma center recommended |
| 25-40 | Severe | 15-30% | Level I/II trauma center |
| 41-74 | Critical | 30-60% | Level I trauma center urgent |
| 75 | Unsurvivable | >90% | Maximum supportive care |
For informational purposes only — not medical advice. Consult a healthcare professional before acting on results.
🏥 Health Facts
— WHO
— CDC
📋 What is the Injury Severity Score?
The Injury Severity Score (ISS) was developed by Baker et al. in 1974 and remains the gold standard for anatomical injury severity assessment in trauma patients. It is based on the Abbreviated Injury Scale (AIS), which rates individual injuries from 1 (minor) to 6 (unsurvivable).
The ISS divides the body into six regions: Head/Neck, Face, Chest, Abdomen, Extremities, and External. The score is calculated by summing the squares of the highest AIS scores from the three most severely injured body regions.
📐 ISS Formula
ISS = (AIS₁)² + (AIS₂)² + (AIS₃)²
Where AIS₁, AIS₂, AIS₃ are the three highest AIS scores from different body regions
If any AIS = 6: ISS = 75 (automatic maximum)
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