Heart Health Calculator

  • Sensitivity Calculator
    Calculate sensitivity (true positive rate) from true positives and false negatives. Free online tool for diagnostic tests and ML classifiers.
  • False Positive Rate Calculator
    Calculate the false positive rate (FPR) from false positives and true negatives. FPR = FP / (FP + TN) = 1 - specificity. Free online tool.
  • Triathlon Heart Rate Training Zones Calculator
    Calculate sport-specific run and bike heart rate training zones for triathlon from your lactate threshold heart rate (LTHR) using the Joe Friel method.
  • Max Heart Rate Calculator
    Estimate your maximum heart rate (HRmax) from age using the Fox (220 − age) or Tanaka (208 − 0.7 × age) formula, plus training heart-rate zones.
  • Heart Rate Zone Calculator
    Calculate your 5 heart rate training zones from age or HRmax. Find target bpm ranges for fat burn, endurance, and peak performance.
  • Heart Rate Recovery Calculator
    Calculate your heart rate recovery (HRR) — the bpm drop one minute after peak exercise. Enter peak and recovery heart rate to gauge fitness.
  • Post-Test Probability Calculator
    Convert pre-test probability and a likelihood ratio into post-test probability using Bayes' theorem and the odds form. Fast clinical decision tool.
  • Relative Risk Calculator
    Calculate relative risk (RR) from a 2x2 table. Enter exposed/unexposed counts with and without the outcome to get the risk ratio instantly.
  • Cycling Heart Rate Zone Calculator
    Calculate your cycling heart rate training zones from your age. Find max HR and the bpm bounds for Zones 1-5 (50-90% MaxHR) to train smarter.
  • Fat Burning Zone Calculator
    Find your fat burning heart rate zone (60-70% of max HR) by age. Calculate target bpm for low-intensity, fat-burning cardio workouts.
  • Bruce Protocol METs Calculator
    Estimate METs and VO2 max from your Bruce treadmill protocol exercise time. Enter total minutes and gender to gauge cardiorespiratory fitness.
  • Brinkman Index (Smoking Index) Calculator
    Calculate your Brinkman Index (Smoking Index) from cigarettes per day and years smoked. A simple measure of cumulative smoking exposure and lung cancer risk.
  • VO2 Max Calculator
    Calculate your VO2 Max and assess your cardiovascular fitness level with our easy-to-use VO2 Max Calculator. Input your age, gender, resting heart rate, and maximum heart rate to get an estimate of your maximal oxygen uptake and see how you compare to fitness standards.
  • Mean Arterial Pressure and Pulse Pressure Calculator
    Calculate Mean Arterial Pressure (MAP) and Pulse Pressure (PP) from your systolic and diastolic blood pressure in mmHg. Universal clinical formula, informational only.
  • LDL Cholesterol & Non-HDL Cholesterol Estimator (Friedewald Formula)
    Estimate LDL (bad) cholesterol, non-HDL cholesterol and the LDL/HDL ratio from a lipid panel using the Friedewald formula. Uses mg/dL units.
  • Target Heart Rate Calculator
    Calculate your target heart rate using age and resting heart rate, and get a personalized training range to guide workout intensity and cardio fitness.
  • MEWS Score Calculator
    Calculate the Modified Early Warning Score (MEWS) from blood pressure, heart rate, respiratory rate, temperature and AVPU to flag patient deterioration.
  • ICH Score Calculator
    Calculate the ICH Score for spontaneous intracerebral hemorrhage from GCS, hematoma volume, IVH, location, and age to estimate 30-day mortality.
  • BMR Calculator (Mifflin-St Jeor)
    Calculate your Basal Metabolic Rate using the Mifflin-St Jeor equation. Enter weight, height, age and gender to find daily resting calories.
  • TIMI Risk Score for STEMI Calculator
    Calculate the TIMI Risk Score for STEMI to estimate 30-day mortality after ST-elevation myocardial infarction from 8 clinical risk factors.
  • Revised Cardiac Risk Index (RCRI) Calculator
    Calculate the Revised Cardiac Risk Index (RCRI) score to estimate perioperative cardiac risk before non-cardiac surgery using 6 clinical factors.
  • Duke Treadmill Score Calculator
    Calculate the Duke Treadmill Score (DTS) from exercise time, ST deviation, and angina index to estimate cardiovascular risk and prognosis.
  • HEART Score Calculator
    Calculate the HEART Score (0-10) for chest pain patients in the ED. Sum History, ECG, Age, Risk factors and Troponin to stratify MACE risk.
  • Padua Prediction Score Calculator
    Calculate the Padua Prediction Score to assess venous thromboembolism (VTE) risk in hospitalized medical patients. Score ≥4 = high risk.

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