Free Parkland Formula Calculator

The Parkland burn formula is the clinical standard for estimating fluid resuscitation during the first 24 hours after a major burn. This burn fluid resuscitation calculator automates the formula by combining the patient’s weight with a burn percentage derived from the rule of nines (or the Wallace rule of nines). By quickly determining the affected body surface area and applying the Parkland calculation, the tool outputs the required volume of IV fluids for burns (typically Ringer’s lactate) and suggests infusion rates over two distinct time windows. The sections below cover the rule of nines for adults and children, a step‑by‑step guide to using the burn percentage calculator, the Parkland equation itself, a worked example, and guidance on which burn depths warrant fluid resuscitation.

The Rule of Nines – Adult

The Wallace rule of nines assigns predefined percentage values to anatomical regions, enabling rapid visual estimation of total body surface area (TBSA) involved in second‑ and third‑degree burns. Only these deeper burns are included; first‑degree (superficial) burns are not counted for fluid resuscitation.

Body region	Percentage of TBSA
Head and neck	9%
Anterior trunk (chest + abdomen)	18%
Posterior trunk (back)	18%
Each upper limb	9%
Each lower limb	18%
Perineum (groin)	1%

The values sum to 100%. When only part of a region is burned (e.g., the front half of an arm), the percentage is halved proportionally.

Modified Rule of Nines for Children

Children have a proportionally larger head and shorter legs than adults. Therefore, the standard adult rule is replaced by the following modified percentages (differences are highlighted).

Body region	Percentage of TBSA
Head and neck	18%
Trunk (anterior + posterior)	36%
Each upper limb	9%
Each lower limb	14%
Perineum	Not routinely assessed (some modifications assign 1%)

This adjustment ensures that fluid resuscitation volumes remain appropriate for pediatric anatomy.

Using the Burn Fluid Resuscitation Calculator

1. Select adult or child.
2. Enter the patient’s body weight in kilograms.
3. Inspect the skin for second‑ and third‑degree burns and mark each affected body region using the corresponding rule of nines. The calculator automatically sums the burn percentage.
4. The tool applies the Parkland burn formula: $$\text{Total fluid (ml)} = \text{Weight (kg)} \times \text{Burn percentage (\% TBSA)} \times 4$$
5. The calculated total is then split into two infusion intervals:
   • First 8 hours: administer half of the total volume. The intravenous flow rate equals $\dfrac{\text{total} / 2}{8}$ ml per hour.
   • Next 16 hours: administer the remaining half, with a flow rate of $\dfrac{\text{total} / 2}{16}$ ml per hour.
6. The computed fluid volume is in addition to the patient’s daily maintenance requirements, a point especially important for children.

Example Calculation

A 38‑year‑old male weighing 82 kg presents with second‑degree burns covering the entire anterior aspect of his left leg and half of the anterior surface of his left arm. Using the adult rule of nines:

• The front of the leg (half of 18%) ≈ 9%.
• Half of the front of the arm (half of 4.5%) ≈ 2.3%.
• Total burn percentage = $9\% + 2.3\% = 11.3\%$.

Plugging into the formula:

$$82 \times 11.3\% \times 4 = 3690\ \text{ml}$$

First 8 hours: $3690 \div 2 = 1845$ ml → $1845 \div 8 \approx 231$ ml/h.
Next 16 hours: $1845 \div 16 \approx 115$ ml/h.

Burn Depth and Indications for the Parkland Formula

• First‑degree (superficial): epidermis only; red, dry, painful, no blisters. Not counted in burn percentage and does not require IV fluid resuscitation.
• Second‑degree (partial thickness): epidermis and part of dermis; blistered, red, swollen, very painful. Included.
• Third‑degree (full thickness): entire epidermis and dermis destroyed; may appear white, black, or charred. Included.
• Fourth‑degree: extends to subcutaneous tissue, muscle, or bone; often painless due to nerve destruction. Included if full‑thickness criteria are met.

The Parkland formula applies only to burns that are second‑degree or deeper.

Managing Minor Burns at Home

Small, first‑degree burns (e.g., mild sunburn) can be treated without hospital admission. Recommended first‑aid steps:

• Cool the burn under running cool water for 5–15 minutes.
• Remove jewelry before swelling occurs.
• Apply a mild moisturizer (aloe vera or petroleum jelly) 2–3 times daily.
• Do not pop blisters.
• Cover with a sterile, non‑stick dressing.
• Use over‑the‑counter analgesics (e.g., ibuprofen, paracetamol) if needed.
• Protect the wound from sunlight and consider a tetanus booster if the last vaccination was more than ten years ago.

For larger, deeper, or more severe burns, seek immediate medical attention.