Parkland Formula Calculator
Calculate IV fluid resuscitation volume for burn patients using the Parkland/Baxter formula. Enter values for instant results with step-by-step formulas.
Formula
Total Fluid (mL) = 4 x Weight (kg) x %TBSA
The Parkland formula calculates the total crystalloid (lactated Ringer's solution) volume needed in the first 24 hours. Half is given in the first 8 hours from time of burn, and half over the next 16 hours. The formula applies to second and third-degree burns exceeding 20% TBSA in adults.
Worked Examples
Example 1: Adult 30% TBSA Burn
Problem: A 70 kg adult sustains 30% TBSA second and third-degree burns. Calculate the Parkland fluid resuscitation protocol.
Solution: Parkland Formula: 4 mL x 70 kg x 30% = 8,400 mL total in 24 hours\nFirst 8 hours: 8,400 / 2 = 4,200 mL at 525 mL/hr\nNext 16 hours: 8,400 / 2 = 4,200 mL at 262.5 mL/hr\nFluid type: Lactated Ringer's solution\nUrine output target: 0.5 x 70 = 35 mL/hr minimum\nClassification: Major burn
Result: Total: 8,400 mL | First 8hr: 525 mL/hr | Next 16hr: 263 mL/hr | Urine target: 35 mL/hr
Example 2: Delayed Resuscitation (2 Hours Post-Burn)
Problem: A 80 kg patient with 40% TBSA burns arrives at the ER 2 hours after the burn. Calculate adjusted fluid rates.
Solution: Total 24hr: 4 x 80 x 40 = 12,800 mL\nFirst 8hr volume: 6,400 mL\nTime elapsed: 2 hours, remaining: 6 hours\nAdjusted rate for first period: 6,400 / 6 = 1,067 mL/hr\n(versus standard rate of 6,400 / 8 = 800 mL/hr)\nNext 16hr: 6,400 mL at 400 mL/hr\nUrine target: 0.5 x 80 = 40 mL/hr
Result: Adjusted first 8hr rate: 1,067 mL/hr (6hr remaining) | Next 16hr: 400 mL/hr
Frequently Asked Questions
What is the Parkland formula and when is it used?
The Parkland formula (also known as the Baxter formula) is the most widely used guideline for calculating initial IV fluid resuscitation volumes for burn patients. Developed by Dr. Charles Baxter at Parkland Memorial Hospital in Dallas, Texas, the formula calculates the total crystalloid volume needed in the first 24 hours after a burn injury as 4 mL multiplied by the patient's body weight in kilograms multiplied by the percentage of total body surface area (TBSA) burned. Half of this volume is administered in the first 8 hours from the time of burn (not from the time of hospital arrival), and the remaining half over the next 16 hours. The formula uses lactated Ringer's solution as the fluid of choice because its composition closely resembles plasma. It is typically applied to burns greater than 20% TBSA in adults and greater than 10% TBSA in children.
What are the key differences between the Parkland and modified Brooke formulas?
The Parkland formula uses 4 mL/kg/%TBSA of crystalloid (lactated Ringer's solution) with no colloid in the first 24 hours, while the modified Brooke formula uses 2 mL/kg/%TBSA of crystalloid, essentially half the Parkland volume. Both formulas distribute the calculated volume with half given in the first 8 hours and the remainder over the next 16 hours. The modified Brooke formula was developed in response to concerns about fluid overload complications (abdominal compartment syndrome, pulmonary edema) seen with the larger Parkland volumes. In practice, most burn centers start with the Parkland formula as an initial estimate and then titrate the rate based on urine output and clinical response. Recent evidence suggests that actual fluid requirements often exceed Parkland predictions, a phenomenon termed fluid creep, making clinical monitoring more important than strict formula adherence.
What formula does Parkland Formula Calculator use?
The formula used is described in the Formula section on this page. It is based on widely accepted standards in the relevant field. If you need a specific reference or citation, the References section provides links to authoritative sources.
How do I interpret the result?
Results are displayed with a label and unit to help you understand the output. Many calculators include a short explanation or classification below the result (for example, a BMI category or risk level). Refer to the worked examples section on this page for real-world context.
How do I get the most accurate result?
Enter values as precisely as possible using the correct units for each field. Check that you have selected the right unit (e.g. kilograms vs pounds, meters vs feet) before calculating. Rounding inputs early can reduce output precision.
Is Parkland Formula Calculator free to use?
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