Surgery & Trauma medical calculators
Burn resuscitation, surgical risk, and fluids.
Surgical and trauma calculators cover burn TBSA and Parkland resuscitation, allowable blood loss, Alvarado appendicitis score, Wells DVT, and perioperative fluid estimates. Burn and blood loss tools in particular require frequent reassessment as exam findings and response to resuscitation evolve.
11 calculators
Allowable Blood Loss & EBV
ABL / EBVEstimate blood volume by age group and calculate allowable blood loss before a target hematocrit.
Alvarado Score (Appendicitis)
AlvaradoScore clinical likelihood of acute appendicitis using the Alvarado (MANTRELS) criteria.
Body Surface Area (BSA)
BSACalculate body surface area with Mosteller, DuBois & DuBois, Haycock, or Gehan & George formulas. Compare all methods side by side.
Burns TBSA & Parkland Formula
Burns / ParklandEstimate percent TBSA with Rule of Nines and calculate Parkland crystalloid resuscitation volumes.
Child-Pugh Score
Child-PughClassify cirrhosis severity (A/B/C) using bilirubin, albumin, INR, ascites, and encephalopathy.
Glasgow Coma Scale (GCS)
GCSScore eye, verbal, and motor responses for rapid neurologic assessment in trauma and critical care.
Ideal Body Weight (Devine)
IBWCalculate Devine ideal body weight, adjusted body weight, and estimated lean body weight.
Maintenance Fluids (4-2-1)
Maintenance FluidsEstimate hourly and daily maintenance IV fluid rates with the Holiday–Segar / 4-2-1 rule.
NEXUS C-Spine Rule
NEXUSApply NEXUS low-risk criteria to help decide whether cervical spine imaging is needed after trauma.
Ottawa Ankle Rules
Ottawa AnkleDecide whether ankle or foot radiographs are indicated after acute blunt injury using Ottawa rules.
Wells Score for DVT
Wells DVTEstimate pretest probability of lower-extremity deep vein thrombosis with the Wells DVT criteria.