Calculators & Scales

Gravity drip rates (gtt/min), pump rates (mL/hr), and weight-based titration (mcg/kg/min) — with the formula shown for every calculation.

Mean arterial pressure from systolic and diastolic readings — with pulse pressure and perfusion-target interpretation for ICU and acute care.

Burn fluid resuscitation by the Parkland formula — 4 mL × kg × %TBSA with the first-8-hours and next-16-hours split calculated from time of injury.

Albumin-corrected calcium from total calcium and serum albumin — with interpretation and the reason low albumin hides true calcium status.

Anion gap from sodium, chloride, and bicarbonate — with albumin correction, interpretation, and the high-gap acidosis causes (MUDPILES) for context.

Cockcroft-Gault creatinine clearance from age, weight, sex, and serum creatinine — with kidney function interpretation and the formula shown.

Glucose-corrected sodium from measured sodium and serum glucose — with interpretation and the reason hyperglycemia masks true sodium status in DKA and HHS.

Body surface area by the Mosteller formula plus BMI from the same height and weight — with chemotherapy-dosing context and BMI category interpretation.

Holliday-Segar maintenance fluid requirements from weight — hourly rate by the 4-2-1 rule and 24-hour volume, with the math shown step by step.

PaO₂/FiO₂ ratio from an ABG and oxygen setting — with Berlin-definition ARDS severity interpretation and the FiO₂ conversion handled for you.

Mealtime insulin from carbohydrate grams and the patient's I:C ratio, plus an optional correction dose from current glucose, target, and sensitivity factor — with the math shown.

Absolute neutrophil count from the WBC and differential — ANC = WBC × (% segs + % bands) ÷ 100 — with neutropenia severity grading and the neutropenic-fever emergency threshold.

Corrected QT interval (Bazett's formula, QTc = QT ÷ √RR) from the measured QT and heart rate — with sex-specific prolongation thresholds and the > 500 ms torsades-de-pointes warning.

Glasgow Coma Scale scoring with eye, verbal, and motor response components and clinical interpretation.

Score all six Braden subscales — sensory perception, moisture, activity, mobility, nutrition, and friction/shear — with instant pressure injury risk interpretation.

Score all six Morse items — fall history, secondary diagnosis, ambulatory aid, IV access, gait, and mental status — with instant fall risk level and precautions.

Score all ten CIWA-Ar items — nausea, tremor, sweats, anxiety, agitation, sensory disturbances, headache, and orientation — with instant alcohol withdrawal severity interpretation.

Score all eleven Clinical Opiate Withdrawal Scale items — pulse, sweating, restlessness, pupils, aches, GI upset, tremor, yawning, anxiety, and gooseflesh — with instant severity interpretation.

Score all nine PHQ-9 depression screening items with instant severity interpretation — and the item-9 safety flag that always takes priority over the total.

Score all seven GAD-7 anxiety screening items with instant severity interpretation and the follow-up each level calls for.

Estimated due date from the last menstrual period using Naegele's rule, plus current gestational age and trimester — with the formula shown.

Score all five APGAR components — appearance, pulse, grimace, activity, respiration — with instant total and interpretation at one and five minutes.

Score cervical dilation, effacement, station, consistency, and position — with instant interpretation of cervical favorability for labor induction.