Sepsis-3 · Surviving Sepsis Campaign · ARDSNet · Berlin Definition
ICU & Critical Care Calculators
11 validated critical care scoring tools for intensivists, emergency physicians, and critical care nurses. SOFA, APACHE II, GCS, MAP, CURB-65, P/F Ratio, and more — all with EMR-ready documentation.
11ICU Calculators
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EMRCharting Notes
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≥65 mmHgMAP target — septic shock
SOFA ≥2Organ dysfunction criterion
GCS ≤8Coma / airway management
P/F <300ARDS Berlin threshold
Intensive Care MedicineEmergency MedicinePulmonologyNephrologyCardiologyNeurocritical CareBurn SurgerySepsis ManagementCritical Care Nursing
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Sepsis & Organ Failure
SOFA Score and APACHE II are the two most used ICU severity tools in US critical care. SOFA is the cornerstone of the Sepsis-3 definition — an acute SOFA increase ≥2 points from baseline in a patient with suspected infection meets the diagnostic criterion for sepsis. APACHE II provides mortality probability estimates used for ICU resource allocation, quality benchmarking, and clinical trial stratification.
Respiratory
Respiratory failure assessment is a daily ICU priority. The P/F Ratio (PaO₂/FiO₂) classifies ARDS severity per the Berlin Definition and guides lung-protective ventilation decisions. The Ventilator Settings calculator implements ARDSNet protocol with tidal volume 6 mL/kg IBW and PEEP optimization. CURB-65 drives pneumonia triage decisions at the ED-ICU interface.
Neurological
The Glasgow Coma Scale (GCS) is the universal language of neurological assessment across emergency medicine, neurosurgery, and critical care. GCS ≤8 indicates coma and typically triggers airway management decisions. The motor component (M1–6) is the most predictive single subscale for outcome in TBI. GCS is also an APACHE II component and influences SOFA neurological scoring.
Cardiovascular
Mean Arterial Pressure ≥65 mmHg is the Surviving Sepsis Campaign target for hemodynamic resuscitation in septic shock. MAP drives vasopressor initiation and titration decisions for norepinephrine, vasopressin, and epinephrine. QTc monitoring is essential in ICU patients on multiple QT-prolonging drugs — antibiotics, antifungals, antipsychotics, and antiarrhythmics all carry risk.
Renal & Metabolic
Anion gap calculation is one of the most frequently ordered mental calculations in the ICU — now with albumin correction and delta ratio for mixed acid-base disorders. RIFLE criteria (Risk, Injury, Failure, Loss, End-stage) provide standardized AKI staging from creatinine doubling and urine output data, correlating directly with mortality risk and renal replacement therapy need.
Burns & Trauma
The Parkland Formula (4 mL × kg × %TBSA) is the US standard for burn fluid resuscitation in the first 24 hours. Accurate initial fluid delivery prevents both under-resuscitation (renal failure, shock) and over-resuscitation (abdominal compartment syndrome, pulmonary edema). Urine output target of 0.5–1 mL/kg/h is the primary resuscitation endpoint.
Built for the Bedside — Critical Care Tools That Work Under Pressure
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Instant Calculation
No submit button — scores update in real time as you enter values. Designed for rapid bedside use during rounds, emergencies, and handoffs.
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EMR Documentation
Each calculator generates a structured SOAP note with the full score, subscale breakdown, interpretation, and evidence references — ready to paste into Epic, Cerner, or any EHR.
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Evidence-Based Thresholds
Every clinical threshold is sourced from primary literature: Sepsis-3, Surviving Sepsis Campaign, ARDSNet, Berlin Definition, RIFLE, and AHA cardiac safety guidelines.
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Mobile-Optimized
Designed to work on any device — phones, tablets, and workstations on wheels. No app download, no login, no ads. Open and calculate in seconds.
ICU Clinical Scoring Systems — A Reference for Critical Care Providers
Clinical scoring systems in the ICU serve two primary functions: real-time clinical decision support and prognostic communication.
Tools like the SOFA Score and APACHE II are used daily to quantify organ dysfunction, guide treatment intensity, predict mortality, and support family conversations about prognosis.
The calculators on this page cover the complete toolkit used by US intensivists, emergency physicians, and critical care nurses across all major ICU patient populations.
Sepsis Assessment — SOFA vs APACHE II vs qSOFA
The SOFA Score is the cornerstone of the Sepsis-3 definition — an acute increase ≥2 points from baseline in a patient with suspected infection meets the diagnostic criterion for sepsis.
APACHE II uses 12 acute physiological variables plus age and chronic health to generate a 0–71 score predicting ICU mortality — a score above 25 carries approximately 50% mortality in most populations.
qSOFA (Quick SOFA: altered mental status + RR ≥22 + SBP ≤100) is the bedside screening tool — positive qSOFA (≥2 criteria) prompts formal SOFA assessment.
Quick Reference — Key ICU Thresholds
MAP < 65 mmHg: Vasopressor threshold in septic shock (norepinephrine first-line per SSC guidelines)
GCS ≤ 8: Coma — airway management typically indicated; GCS Motor score most predictive in TBI
P/F Ratio < 300: ARDS threshold; <200 = moderate ARDS; <100 = severe ARDS (Berlin Definition)
CURB-65 ≥ 3: Severe CAP — ICU admission or close inpatient monitoring required
QTc > 500 ms: Critical prolongation — high risk of torsades de pointes; reassess all QT-prolonging agents