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Burn Percentage Calculator
Calculate Total Body Surface Area (TBSA) burn percentage using the Wallace Rule of Nines for adults and pediatric adjustments, with fluid resuscitation estimates.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Select Affected Anatomical Burn Areas
Total Body Surface Area (TBSA) Burned
0%
Minor Burn (< 10% TBSA)
Parkland Formula (24-hr Lactated Ringer's)
0 mL
First 8 hrs: 0 mL (50%) | Next 16 hrs: 0 mL (50%)
How it works
- Select the patient demographic (Adult or Pediatric).
- Enter patient body weight in kilograms to calculate IV fluid requirements.
- Check off all anatomical regions presenting partial- or full-thickness burns.
- View the calculated Total Body Surface Area (TBSA) percentage, burn severity triage level, and Parkland fluid rate.
The formula
Adult Rule of Nines: Head (9%), Chest (9%), Abdomen (9%), Upper Back (9%), Lower Back (9%), Left Arm (9%), Right Arm (9%), Left Leg Front/Back (18%), Right Leg Front/Back (18%), Groin (1%)
Parkland Fluid Volume (mL) = 4 mL × Weight (kg) × TBSA (%)
FAQ
What is the Wallace Rule of Nines?
The Wallace Rule of Nines is a clinical tool used in emergency medicine to quickly estimate the Total Body Surface Area (TBSA) affected by second- and third-degree burns in adults, assigning multiples of 9% to major anatomical regions.
How are pediatric burn percentages adjusted?
Because infants and young children have proportionally larger heads and smaller lower extremities than adults, pediatric models allocate 18% TBSA to the head and 13.5% to each leg.
What is the Parkland Formula for burn resuscitation?
The Parkland formula calculates intravenous fluid requirements for the first 24 hours of burn care: 4 mL of Lactated Ringer's solution per kilogram of body weight per percentage of TBSA burned. Half is given over the first 8 hours post-injury, and the remainder over the next 16 hours.
Are superficial first-degree burns (like mild sunburn) included in TBSA?
No. Superficial erythema (first-degree burns) is typically excluded from TBSA calculations when estimating fluid resuscitation needs.
How we compare
| Feature | Online Tool Store | Static reference tables | Textbooks |
|---|---|---|---|
| Interactive anatomical checklist | ✓ | ✗ | ✗ |
| Integrated Parkland fluid calculation | ✓ | ✗ | Formula only |
| Adult and Pediatric mode toggle | ✓ | ✓ | ✓ |