Emergency Medicine Calculators & Scoring Tools
Critical decision-support tools for emergency medicine including Glasgow Coma Scale, APACHE II, Wells Score, CURB-65, PERC Rule, qSOFA, and the Canadian Head CT Rule. Designed for rapid bedside assessment and triage.
This category currently includes 31 tools, including Wells Score (DVT), Wells Score (PE), and Revised Geneva Score.
These resources are built for clinicians, trainees, and medically informed patients who need fast bedside calculations. Use the results as decision support and pair them with full clinical context and local guidelines.
All Emergency Tools (31)
Wells Score (DVT)
Calculate Wells DVT pretest probability in seconds. Score 10 clinical criteria for low, moderate, or high DVT risk — with D-dimer and ultrasound next steps.
Wells Score (PE)
Calculate Wells Score for PE to estimate pretest probability and guide D-dimer testing versus direct CTPA for pulmonary embolism workup.
Revised Geneva Score
Calculate the Revised Geneva Score using objective criteria to estimate pulmonary embolism pretest probability.
YEARS Algorithm
Apply the YEARS algorithm with D-dimer to determine whether pulmonary embolism can be ruled out without CTPA.
Age-Adjusted D-dimer
Calculate age-adjusted D-dimer cutoffs to improve specificity in PE/DVT rule-out pathways for older adults.
sPESI Score
Calculate sPESI to estimate 30-day mortality risk in confirmed pulmonary embolism and support disposition decisions.
PESI Score
Calculate full PESI to classify 30-day mortality risk in confirmed pulmonary embolism (Class I-V).
HESTIA Criteria
Evaluate HESTIA exclusion criteria to support outpatient versus inpatient treatment decisions in confirmed PE.
CRB-65 Score
Calculate CRB-65 for community-acquired pneumonia severity when lab data is unavailable.
CURB-65 Score
Calculate CURB-65 for community-acquired pneumonia severity to guide outpatient treatment, hospital admission, or ICU-level evaluation.
PSI / PORT Score
Calculate PSI (Pneumonia Severity Index) to classify CAP mortality risk (Class I-V) and guide outpatient treatment, observation, or hospital admission.
Glasgow Coma Scale
Calculate the Glasgow Coma Scale score to assess level of consciousness. Used worldwide in emergency medicine and trauma assessment.
APACHE II Score
Calculate the APACHE II score to predict ICU mortality risk. Uses acute physiological variables, age, and chronic health status.
PERC Rule
Use PERC (Pulmonary Embolism Rule-out Criteria) to rule out PE in low-risk patients without D-dimer or CT when all 8 criteria are negative.
NEWS2 Score
Calculate NEWS2 from vital signs and mental status to detect acute clinical deterioration and guide escalation urgency.
Shock Index
Calculate the Shock Index (HR/SBP ratio) for rapid hemodynamic assessment. Normal: 0.5–0.7. Score ≥1.0 indicates hemodynamic compromise; ≥1.4 indicates severe shock requiring immediate intervention.
qSOFA Score
Calculate qSOFA bedside sepsis risk score. A score of 2 or more (altered mentation, RR ≥22, SBP ≤100) flags high-risk infection requiring urgent evaluation.
SOFA Score
Calculate the SOFA score to assess organ dysfunction severity in critically ill patients. Scores range from 0 to 24 across six organ systems.
SIRS Criteria
Evaluate SIRS criteria for systemic inflammatory response. Two or more criteria (temperature, HR, RR, WBC) indicates SIRS. Note: Sepsis-3 definitions now prefer qSOFA and SOFA scoring.
Parkland Formula
Calculate IV fluid requirements for burn patients using the Parkland formula: 4 mL × kg × % TBSA in 24 hours. Half given in first 8 hours from injury, half over next 16 hours.
Revised Trauma Score
Calculate the Revised Trauma Score (RTS) for trauma triage and survival prediction. Combines GCS, systolic BP, and respiratory rate. Maximum score 7.84; RTS <4 predicts high mortality.
Alvarado Score
Calculate Alvarado score to estimate appendicitis likelihood from symptoms, signs, and basic lab findings.
LRINEC Score
Calculate LRINEC from routine labs to estimate risk of necrotizing soft tissue infection.
qCSI Score
Calculate qCSI to estimate short-term risk of critical respiratory illness using respiratory rate, SpO2, and oxygen flow.
SF Syncope Rule
Apply CHESS criteria to estimate short-term serious outcome risk after syncope.
Canadian Head CT
Apply the Canadian CT Head Rule to determine if CT is needed after minor head injury (GCS 13–15). Achieves 98.4% sensitivity for neurosurgically significant injuries, safely reducing CT use.
NEXUS C-Spine
Apply the NEXUS criteria to determine if cervical spine imaging is needed after trauma. All 5 criteria absent gives 99.8% NPV for significant C-spine injury, safely avoiding CT or X-ray.
ESI Triage
Classify ED triage acuity using Emergency Severity Index levels 1-5 based on life threat, high-risk features, and expected resource needs.
CAM-ICU
Screen ICU patients for delirium using the CAM-ICU algorithm (acute/fluctuating change, inattention, consciousness, disorganized thinking).
RASS Score
Classify bedside agitation or sedation from +4 (combative) to -5 (unarousable) using the Richmond Agitation-Sedation Scale.
CPOT Score
Estimate pain behavior in non-verbal or critically ill adults using CPOT domains (facial expression, body movement, muscle tension, and ventilator/vocalization).