Burn Calculator
Estimate adult total body surface area burned using the Rule of Nines. Select whether one-quarter, one-half, three-quarters, or the entire region is burned.
Head and Neck
Entire head and neck
Entire region: 9%
TBSA contributed by this region
0.00%
Right Arm
Entire right arm
Entire region: 9%
TBSA contributed by this region
0.00%
Left Arm
Entire left arm
Entire region: 9%
TBSA contributed by this region
0.00%
Anterior Trunk
Chest and abdomen
Entire region: 18%
TBSA contributed by this region
0.00%
Posterior Trunk
Entire back
Entire region: 18%
TBSA contributed by this region
0.00%
Right Leg
Entire right leg
Entire region: 18%
TBSA contributed by this region
0.00%
Left Leg
Entire left leg
Entire region: 18%
TBSA contributed by this region
0.00%
Perineum
Genital and perineal area
Entire region: 1%
TBSA contributed by this region
0.00%
Estimated Burn Size
0.00%
Total body surface area burned
Estimated 24-Hour Fluid Volume
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First 8 Hours
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Next 16 Hours
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Important Limitations
The Rule of Nines is intended as a rapid adult burn-size estimate. Pediatric patients have proportionally larger heads and smaller legs, so a Lund-Browder chart is more accurate.
Do not include superficial, first-degree burns when calculating TBSA for fluid-resuscitation decisions.
The patient’s palm, including the fingers, is approximately 1% of body surface area and may be useful for small or irregular burns.
Clinical Safety Reminder
This tool is for education and estimation only. Confirm burn depth, TBSA, fluid requirements, time of injury, inhalation injury risk, patient age, comorbidities, local EMS protocols, and medical-control direction before treatment or transport decisions.