Heart Health Calculator

These calculators cover key cardiovascular metrics — from checking your Cholesterol Ratio and estimating VO2 Max to finding your aerobic training zones with the Target Heart Rate Calculator or the more precise Karvonen Formula version. Clinical tools like the QTc Calculator and Rate Pressure Product Calculator give deeper insight into cardiac workload, while the Estimated Average Glucose Calculator bridges heart and metabolic health.

Browse the most-popular list to see which tools other visitors rely on, or open the Trending tab to see what's gaining attention. Every calculator is free, requires no sign-up, and works on any device.

  • 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.
  • Mean Arterial Pressure (MAP) Calculator
    Calculate Mean Arterial Pressure (MAP) from your systolic and diastolic blood pressure using MAP = DBP + (SBP − DBP)/3. Free, instant.
  • PERC Rule Calculator
    PERC Rule Calculator checks all 8 criteria (age, heart rate, SpO2, hemoptysis, estrogen, VTE, surgery, leg swelling) to rule out pulmonary embolism.
  • Wells Score for Pulmonary Embolism Calculator
    Calculate the Wells Score for pulmonary embolism (PE). Add weighted clinical criteria to estimate PE probability with three-tier and two-tier risk.
  • Wells Score for DVT Calculator
    Calculate the Wells Score for deep vein thrombosis (DVT) by summing 10 weighted clinical criteria to stratify low, moderate, or high pretest probability.
  • TIMI Risk Score for UA/NSTEMI Calculator
    Calculate the TIMI Risk Score for unstable angina and NSTEMI by summing 7 clinical risk factors to estimate 14-day adverse event risk.
  • Creatinine Clearance (IBW) Calculator
    Estimate creatinine clearance (CrCl) with the Cockcroft-Gault equation using age, weight, sex, and serum creatinine. Result in mL/min for renal dosing.
  • Steps to Calories Calculator
    Convert daily steps into calories burned. Enter steps, body weight and stride length to estimate kcal and distance walked instantly.
  • Katch-McArdle BMR Calculator
    Calculate your Basal Metabolic Rate with the Katch-McArdle formula using body weight and body fat percentage for a lean-mass based estimate.
  • Cooper 12-Minute Run VO2 Max Calculator
    Estimate your VO2 max from the Cooper 12-minute run test. Enter distance in meters to calculate aerobic fitness instantly with the Cooper formula.
  • Fractional Excretion of Sodium (FENa) Calculator
    Calculate the Fractional Excretion of Sodium (FENa%) from urine and plasma sodium and creatinine to help differentiate prerenal from intrinsic acute kidney injury.
  • Maximum Heart Rate Calculator (220 - Age)
    Estimate your maximum heart rate with the simple Fox formula (220 - age) and see your 50%-85% target training zones in bpm.
  • NIHSS Stroke Scale Calculator
    Calculate the NIH Stroke Scale (NIHSS) by summing 11 neurological items for a total stroke severity score from 0 to 42 with category.
  • Cholesterol Unit Converter (mg/dL ↔ mmol/L)
    Convert cholesterol and triglyceride values between mg/dL and mmol/L instantly. Uses 38.67 for cholesterol and 88.57 for triglycerides.
  • Blood Glucose Unit Converter
    Convert blood glucose between mg/dL and mmol/L instantly. Enter a value and unit to switch between US and international glucose measurement units.
  • Heart Rate as Percent of Max Calculator
    Calculate your current heart rate as a percentage of your estimated maximum heart rate (220 − age). Find your training intensity zone instantly.
  • Waist Circumference Percentile Calculator
    Check your abdominal-obesity health risk from waist circumference. Men >102cm/40in and women >88cm/35in flag high risk. Free, instant, cm or inches.
  • Non-HDL Cholesterol Calculator
    Calculate your non-HDL cholesterol by subtracting HDL from total cholesterol (mg/dL). Includes risk category interpretation. Educational use only.
  • Pulse Pressure Calculator
    Calculate pulse pressure from your blood pressure: Pulse Pressure = Systolic − Diastolic. See if your value is low, normal, or high, plus estimated MAP.
  • Max Heart Rate Calculator (Tanaka Formula)
    Estimate your maximum heart rate from age using the Tanaka formula (208 − 0.7 × age). Get bpm plus moderate and vigorous training heart-rate zones.
  • Target Heart Rate Zone Calculator (Karvonen)
    Calculate your target heart rate training zone using the Karvonen formula based on age, resting heart rate, and exercise intensity percentage.
  • Normal Heart Rate by Age Calculator
    Find the normal resting heart rate range (BPM) by age for children and adults, plus tachycardia and bradycardia thresholds. Educational guide only.
  • Corrected Sodium Calculator (Hyperglycemia)
    Calculate corrected serum sodium in hyperglycemia. Adds 1.6 (or 2.4) mEq/L per 100 mg/dL glucose above 100. For clinical education only.
  • Resting Heart Rate Fitness Calculator
    Find your fitness level from your resting heart rate. Compares your RHR against standard age and sex norms to rate it Athlete to Poor.

Frequently asked questions

What heart health metrics can these calculators estimate?

You can assess aerobic capacity with the VO2 Max Calculator, find safe training zones with the Target Heart Rate and Karvonen Formula calculators, evaluate cardiac efficiency via the Rate Pressure Product, review cholesterol balance with the Cholesterol Ratio Calculator, and track average glucose levels with the eAG Calculator.

How accurate are the results, and can I use them for clinical decisions?

Tools like the QTc Calculator and Rate Pressure Product Calculator apply standard clinical formulas. However, all outputs are estimates based on your input values — they are NOT a substitute for medical advice or professional diagnosis. Always consult a qualified healthcare professional or clinician before acting on any cardiovascular health information.

What is the Karvonen Formula Target Heart Rate Calculator used for?

It uses your resting heart rate alongside your maximum heart rate to set training zones personalized to your current fitness level — more precise than the basic age-subtracted formula. It's widely used by endurance athletes and personal trainers for structuring cardio sessions at the right intensity.

Do you save any of the health data I enter?

No. Every calculation runs entirely in your browser. Heart rate values, cholesterol numbers, ECG intervals, and any other inputs are never transmitted to our servers or stored between sessions.

Which heart health calculators are used most?

The page is ordered by real visitor usage. Open the Trending tab to see which tools are getting the biggest recent boost in traffic, or the Recently Added tab for the newest tools in the collection.

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