The Modified Brooke Burn Formula is a fluid resuscitation guideline used in acute thermal burns to estimate the amount of IV crystalloid required in the first 24 hours after injury.
It’s an evolution of the original Brooke formula, and in many centres is used alongside (or instead of) the Parkland formula. The key difference is that the Modified Brooke formula generally recommends less fluid than Parkland, aiming to reduce complications from over-resuscitation (e.g. oedema, compartment syndromes, ARDS).
Modified Brooke Burn Formula
Estimates initial crystalloid volume for adults with acute thermal burns (first 24 hours post-injury)
For use by health professionals only. This calculator uses the adult Modified Brooke formula (2 mL × weight (kg) × %TBSA) and assumes Ringer’s lactate or similar crystalloid. It is an initial estimate only and does not replace specialist burn/ICU input or hourly reassessment of urine output, haemodynamics, and clinical status.
Enter patient and burn details
Total fluid in first 24 h: – mL (– L)
Planned distribution:
• First 8 h from time of burn:
– mL
(– mL/h)
• Next 16 h:
– mL
(– mL/h)
From – hours after burn (now) onwards:
• Volume still to give in remaining 24 h period:
– mL
• Suggested starting rate for next block:
– mL/h
Enter weight, %TBSA burned, and hours since burn, then click “Calculate fluid requirement” to see the estimated volumes and rates. Always titrate based on urine output and clinical response.
The Modified Brooke formula (adult, 2 mL × kg × %TBSA) generally yields lower volumes than the Parkland formula (4 mL × kg × %TBSA). Half the volume is given in the first 8 hours from time of burn, and half over the next 16 hours. This is an initial guide only; adjust fluid based on urine output, haemodynamic parameters, acid–base status, and specialist burn centre recommendations.
