Health and Fitness

  • Heart Rate from RR Interval Calculator
    Convert an ECG RR interval in milliseconds to heart rate in beats per minute (bpm) instantly using HR = 60000 / RR. Free, fast and accurate.
  • Percentage of 1RM Calculator
    Calculate your working weight as a percentage of your one-rep max (1RM). Enter your 1RM and target percent to get the exact training load plus a full % table.
  • BMI Category Score Calculator
    Calculate your BMI (Body Mass Index) from weight and height in metric units and instantly see your category: underweight, normal, overweight or obese.
  • Daily Protein Intake Calculator
    Calculate your daily protein needs in grams from body weight and activity level (0.8–2.2 g/kg). Free, instant protein intake calculator.
  • Calories Burned by Steps Calculator
    Estimate calories burned from your step count, body weight and height. Free calculator using stride length and distance to give kcal burned walking.
  • Mean Arterial Pressure (MAP) Calculator
    Calculate Mean Arterial Pressure (MAP) from systolic and diastolic blood pressure. MAP = DBP + (SBP − DBP)/3. Instant mmHg result and pulse pressure.
  • CrCl Calculator
    Calculate creatinine clearance (CrCl) from age, weight (kg), serum creatinine (mg/dL), and gender using the Cockcroft–Gault formula.
  • QUICKI Calculator
    Enter fasting insulin (µIU/mL) and fasting glucose (mg/dL) to calculate QUICKI and gauge insulin sensitivity in seconds.
  • BSA Calculator
    Calculate body surface area (BSA) in m² from height (cm) and weight (kg). Pick Mosteller, Du Bois, Haycock, Gehan & George, or Boyd.
  • Pediatric Dose Volume Calculator
    Convert a weight-based dose (mg/kg) into the liquid volume (mL) to administer using the medication concentration. Quick, accurate dosing helper.
  • Serum Osmolality Calculator
    Calculate estimated serum osmolality (mOsm/kg) from sodium, glucose, and BUN using the standard 2×Na + Glucose/18 + BUN/2.8 formula.
  • mEq/L Calculator
    Convert mg/L to mEq/L for any electrolyte using its valence and atomic weight. Free milliequivalents per liter calculator with worked examples.
  • Drug Infusion Rate from Dose Calculator
    Calculate IV infusion pump rate in mL/hr from a weight-based dose (mcg/kg/min) and solution concentration. Fast, accurate drip rate tool for clinicians.
  • Target Heart Rate Zone Percentage Calculator
    Calculate your target heart rate at any exercise intensity percentage using your age and the 220-minus-age maximum heart rate formula.
  • mmol/L to mg/dL Calculator
    Convert mmol/L to mg/dL for glucose, cholesterol, creatinine, urea and more. Uses mg/dL = (mmol/L × MW) / 10 with selectable molecular weights.
  • mg/dL to mmol/L Calculator
    Convert mg/dL to mmol/L for glucose, cholesterol, triglycerides or any substance using its molecular weight. Fast, accurate clinical unit converter.
  • IV Drip Rate Calculator (gtt/min)
    Calculate IV drip rate in drops per minute (gtt/min) from volume, infusion time, and drop factor. Free, fast nursing flow-rate tool.
  • Percent Daily Value (%DV) Calculator
    Calculate the Percent Daily Value (%DV) of a nutrient from the amount per serving and its recommended daily value. Fast, free %DV nutrition calculator.
  • IV Infusion Rate Calculator
    Calculate IV infusion rate in mL/hr from total volume and time. Also computes drip rate (gtt/min) using a drop factor. Fast, free pump-rate tool.
  • Dose to Volume Calculator
    Convert an ordered medication dose into the volume to administer using stock concentration. Volume = Dose / Concentration. Fast, free dosage tool.
  • mg/kg Dosage Calculator
    Calculate a weight-based medication dose in mg using the mg/kg formula. Enter dose per kg and body weight (kg or lb) for instant results.
  • Bulking & Cutting Calorie Calculator
    Calculate your daily calorie target for bulking, cutting, or maintaining based on your TDEE. Bulk at 110-120% and cut at 75-85% of maintenance.
  • BMI Calculator
    Calculate your BMI in seconds. Enter height and weight in metric or imperial units to get your body mass index and weight category instantly.
  • Barbell Plate Loading Calculator
    Figure out exactly which weight plates to load on each side of your barbell to hit a target weight. Supports pounds and kilograms.

Categories