Medical Calculators & Clinical Tools
Choose a calculator based on the clinical question and available measurements. Every tool shows its method, units, intended use, and important limits.
Available clinical calculators
Maintenance Fluid Calculator
Calculate separate pediatric 4-2-1 hourly and Holliday-Segar 100-50-20 daily maintenance fluid estimates by weight.
Open calculator →Free Water Deficit Calculator
Estimate an adult free water deficit from weight, a visible total-body-water factor, current sodium, and target sodium.
Open calculator →Serum Osmolality Calculator
Calculate total and effective serum osmolality with U.S. or SI units, optional ethanol, and an optional osmolal gap.
Open calculator →Corrected Sodium Calculator
Adjust measured sodium for elevated glucose and compare the Katz 1.6 and Hillier 2.4 correction factors.
Open calculator →Anion Gap Calculator
Calculate serum anion gap with visible working, optional albumin correction, potassium, and conditional delta-ratio context.
Open calculator →ABG Calculator
Interpret acid-base status, compensation, anion gap, oxygenation, and related blood-gas measures.
Open calculator →Corrected Calcium Calculator
Adjust total calcium for albumin in mg/dL or mmol/L and review the formula, units, and important limits.
Open calculator →GFR Calculator
Estimate adult kidney filtration using serum creatinine and validated eGFR equations.
Open calculator →HEART Score for Chest Pain
Calculate the five-component HEART Score and view study-based short-term MACE context.
Open calculator →Cardiac Output Calculator
Calculate blood flow using stroke volume, direct Fick, or Doppler LVOT/VTI inputs.
Open calculator →mg to mL Calculator
Convert a prescribed mass and liquid concentration into a volume with visible units.
Open calculator →Liquid Dosage Calculator
Calculate liquid volume from dose and concentration while keeping units explicit.
Open calculator →Use the correct inputs and units
Clinical formulas are only as reliable as their inputs. Check laboratory units, reference ranges, sampling method, patient population, and the version of the equation before interpreting any result.
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