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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 works right here on your device — nothing gets sent out.
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 | ✓ | ✓ | ✓ |