Use the Burns Body Map
Tap a body diagram to calculate TBSA visually
Formula
4 mL × Weight (kg) × %TBSA
Lactated Ringer's or Normal Saline over 24 hours
kg
%
Do not include superficial / 1° burns in TBSA estimate
Optional — calculates remaining fluid based on time elapsed
Fluid Plan
Total Volume (24h)
—
mL Lactated Ringer's
First 8 hours
½ total — from time of burn
—
— mL/hr
Next 8 hours
¼ total (hours 8–16)
—
— mL/hr
Final 8 hours
¼ total (hours 16–24)
—
— mL/hr
Remaining in current period
—
— mL/hr for remaining time
Rule of Nines — TBSA Reference
Head & Neck9%
Each Arm9%
Anterior Trunk18%
Posterior Trunk18%
Each Leg18%
Genitalia1%
Paediatric: Head = 18%, each leg = 13.5% (Lund-Browder chart preferred)
Titrate fluid to urine output: 0.5–1 mL/kg/hr in adults, 1 mL/kg/hr in children. This formula is a starting guide only.