Corrected Calcium Calculator (Albumin-Adjusted)
Adjust total serum calcium for low albumin using the Payne formula.
Creatinine Clearance Calculator (Cockcroft-Gault)
Estimate CrCl for drug dosing using the Cockcroft-Gault equation.
QTc Calculator (Bazett & Fridericia)
Correct the QT interval for heart rate using two standard formulas.
Shock Index Calculator
Screen for occult hemodynamic compromise from heart rate and systolic BP.
Ideal Body Weight Calculator (Devine Formula)
Devine formula IBW used for drug dosing and ventilator settings.
Adjusted Body Weight Calculator
Dosing weight for obese patients that blends actual and ideal weight.
ABG Interpretation Aid
Step through pH, CO2, and bicarbonate to a likely acid-base pattern.
Opioid Morphine Milligram Equivalent (MME) Calculator
Convert an opioid regimen to daily MME for safety review.
Wells Score for DVT Calculator
Pretest probability of DVT from clinical criteria to guide next steps.
Wells Score for Pulmonary Embolism Calculator
Pretest probability of PE to decide between D-dimer and CT angiography.
Maintenance IV Fluid Rate Calculator (Holliday-Segar)
Hourly maintenance fluid needs from weight using the 4-2-1 rule.
NG Tube Output Fluid Replacement Calculator
Replace ongoing nasogastric or drain losses on top of maintenance fluids.
Insulin Correction Dose Calculator
Extra rapid-acting insulin needed to bring a high glucose to target.
Fractional Excretion of Sodium (FeNa) Calculator
Distinguish prerenal from intrinsic acute kidney injury.
Osmolar Gap Calculator
Screen for unmeasured osmoles like toxic alcohols.
CURB-65 Pneumonia Severity Score
Estimate 30-day mortality risk in community-acquired pneumonia.
CHA2DS2-VASc Score Calculator
Annual stroke risk in atrial fibrillation to guide anticoagulation.
HAS-BLED Bleeding Risk Calculator
Estimate major bleeding risk on anticoagulation for atrial fibrillation.
Child-Pugh Score Calculator
Classify cirrhosis severity and estimate survival using five criteria.
MELD-Na Score Calculator
Model for End-Stage Liver Disease score used for transplant priority.
Glasgow Coma Scale (GCS) Calculator
Standardize level of consciousness across eye, verbal, and motor response.
Winter's Formula Calculator
Check whether pCO2 appropriately compensates a metabolic acidosis.
Delta Gap / Delta Ratio Calculator
Detect a hidden second metabolic process alongside an anion gap acidosis.
Total Daily Insulin Dose Estimator
Weight-based starting insulin dose split into basal and bolus components.
Bishop Score Calculator
Assess cervical favorability before scheduling induction of labor.
BMI Calculator
Calculate your Body Mass Index from height and weight.
BMR Calculator
Basal metabolic rate — calories burned at rest.
TDEE Calculator
Total daily energy expenditure — calories you burn in a day.
Calorie Calculator
How many calories you need per day for your goal.
Ideal Weight Calculator
Estimate ideal body weight from height and sex.
Body Fat Calculator
U.S. Navy method for body fat percentage.
Macro Calculator
Split daily calories into protein, carbs, and fat.
Pace Calculator
Pace, distance, and finish time for runners.
One Rep Max Calculator
Estimate your one rep max from a tested rep.
Pregnancy Due Date Calculator
Estimate your due date from your last period.
Ovulation Calculator
Predict your fertile window.
Heart Rate Zones Calculator
Find your training zones from age.
Water Intake Calculator
Daily water target based on body weight and activity.
Protein Intake Calculator
Grams of protein per day for your goal and training load.
Calorie Deficit Calculator
Daily calories and weeks to reach your goal weight.
Strength Score Calculator
Compare total across bodyweights with a relative strength score.
Running Pace Calculator
Pace per mile and km, plus finish times for common races.
Calories Burned Calculator
Energy burned using MET values for common activities.
Steps to Miles Calculator
Convert daily steps into distance and calories burned.
Navy Body Fat Calculator
Body fat percentage from tape measurements.
Heart Rate Zone Calculator
Five training zones using the Karvonen reserve method.
Pregnancy Due Date Calculator
Estimated due date, trimesters, and weeks along.
BAC Calculator
Estimated BAC from drinks, weight, and time elapsed.
Macro Split Calculator
Grams of protein, carbs, and fat for your calorie target.
Marathon Finish Time Predictor
Project a marathon or half finish time from a recent race result.
Cycling Power to Speed Calculator
Estimate speed from watts, or watts needed to hold a speed.
Swim Pace & Split Calculator
Pace per 100, total time, and split targets for any swim distance.
Triathlon Split & Finish Time Calculator
Swim, bike, run, and transition times for any triathlon distance.
IV Drip Rate Calculator
Drops per minute and mL/hr for any infusion volume and time.
Weight-Based Dosage Calculator
Total dose and volume to draw from a mg/kg order.
eGFR Kidney Function Calculator
Estimated glomerular filtration rate from serum creatinine.
Anion Gap Calculator
Serum anion gap with albumin correction and delta gap.
Corrected Sodium Calculator
Adjust measured sodium for hyperglycemia, plus free water deficit.
Insulin Dose & Carb Ratio Calculator
Meal bolus, correction dose, and insulin sensitivity factor.
A1C to Average Glucose Converter
Convert HbA1c to estimated average glucose in mg/dL and mmol/L.
Mean Arterial Pressure Calculator
Mean arterial pressure, pulse pressure, and perfusion check.
Body Surface Area (BSA) Calculator
BSA by Mosteller, Du Bois, and Haycock formulas.
Burn TBSA & Fluid Resuscitation Calculator
Rule of nines total body surface area and Parkland fluid volume.
Apgar Score Calculator
Score a newborn across the five Apgar criteria.
Medication Cost Per Dose Calculator
Cost per dose, per day, and annual — brand vs generic.
Child Growth Percentile Calculator
Estimate your child's weight/height percentile using CDC-style z-scores.
UV Exposure Burn Time Calculator
Estimate minutes to sunburn based on UV index, skin type, and sunscreen SPF.
Air Quality Exposure Equivalent Calculator
Convert PM2.5 air pollution exposure into a cigarette-equivalent for intuitive comparison.
WBGT Heat Stress Calculator
Estimate Wet Bulb Globe Temperature and safe work/exercise guidance in the sun.