Abbreviated Burn Severity Index (ABSI)

Calculate the Abbreviated Burn Severity Index to predict burn mortality from age, sex, presence of inhalation injury, full-thickness burn, and total body surface area burned.

Weight
Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Calculate the Abbreviated Burn Severity Index to predict burn mortality from age, sex, presence of inhalation injury, full-thickness burn, and total body surface area burned

Each component has a specific meaning:

  • Age — The age recorded for the scenario being assessed.
  • Sex — The sex recorded for the scenario being assessed.
  • Presence of inhalation injury — The presence of inhalation injury recorded for the scenario being assessed.
  • Full-thickness burn — The full-thickness burn recorded for the scenario being assessed.

Note: Interpret the absi result against the thresholds and context described above.

How to Use

Enter the age, sex, presence of inhalation injury, full-thickness burn for the scenario you are assessing. Calculate the Abbreviated Burn Severity Index to predict burn mortality from age, sex, presence of inhalation injury, full-thickness burn, and total body surface area burned. Use the absi result to inform your calculation.

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