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.
  • 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.
  • 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.
  • 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.
  • Anaerobic Threshold Calculator
    Estimate your anaerobic threshold (AT) heart rate from age and intensity percentage. Uses AT_HR = % × (220 − age) for training zone targeting.
  • 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.
  • 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.
  • 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.
  • 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.
  • Padua Prediction Score Calculator
    Calculate the Padua Prediction Score to assess venous thromboembolism (VTE) risk in hospitalized medical patients. Score ≥4 = high risk.
  • 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.
  • Duke Treadmill Score Calculator
    Calculate the Duke Treadmill Score (DTS) from exercise time, ST deviation, and angina index to estimate cardiovascular risk and prognosis.
  • 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.
  • 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.
  • HAS-BLED Score Calculator
    Calculate the HAS-BLED score to estimate 1-year major bleeding risk in atrial fibrillation patients on anticoagulation. Score range 0–9 with risk category.
  • CHA₂DS₂-VASc Score Calculator
    Calculate the CHA2DS2-VASc score to estimate annual stroke risk in patients with non-valvular atrial fibrillation and guide anticoagulation decisions.

Categories