Calculators to help you protect your heart
50 tools matched to this goal.
Waist-to-Hip Ratio Calculator
Check where your body stores fat and the related health risk.
Waist-to-Height Ratio Calculator
A simple rule: keep your waist under half your height.
Body Roundness Index Calculator
A shape-based index of visceral fat from waist and height.
Healthy Weight Range Calculator
The weight range that gives a BMI of 18.5 to 24.9 for your height.
Relative Fat Mass Calculator
A body fat estimate using only height and waist.
A Body Shape Index (ABSI) Calculator
Waist risk adjusted for height and weight.
Waist Circumference Risk Calculator
Check waist size against sex-specific risk thresholds.
Conicity Index Calculator
Body shape and central fat distribution from waist, weight and height.
Fiber Intake Calculator
Your daily fiber goal and how your intake compares.
Sodium Intake Calculator
Add up sodium across meals and compare with limits.
Daily Potassium Needs Calculator
Adequate daily potassium intake for adults by sex.
Fruit and Vegetable Servings Tracker
See how close you are to a 5-a-day fruit and vegetable target.
Target Heart Rate Calculator
Heart rate training zones using the Karvonen method.
Max Heart Rate Calculator
Maximum heart rate from several published formulas.
VO2 Max Calculator
Estimate aerobic fitness from the Cooper 12-minute run.
Heart Rate Recovery Calculator
How quickly your pulse drops one minute after exercise.
Weekly Activity Goal Calculator
Check your weekly minutes against the 150-minute moderate activity guideline.
Rockport One-Mile Walk Fitness Test
Estimate VO2 max from a one-mile walk time and heart rate.
Blood Pressure Category Calculator
See which ACC/AHA blood pressure category you fall in.
Mean Arterial Pressure Calculator
Average pressure that perfuses your organs.
Pulse Pressure Calculator
The gap between your top and bottom blood pressure numbers.
Cholesterol Ratio Calculator
Total-to-HDL ratio as a heart risk indicator.
LDL Cholesterol Calculator
Estimate LDL from a standard lipid panel (Friedewald).
Non-HDL Cholesterol Calculator
All the cholesterol carried by harmful particles.
Triglyceride-to-HDL Ratio Calculator
A quick marker of insulin resistance and heart risk.
Corrected QT (QTc) Calculator
Correct the ECG QT interval for heart rate.
Cardiac Output Calculator
Blood pumped per minute and cardiac index.
Rate Pressure Product Calculator
Heart workload from pulse and systolic pressure.
Resting Heart Rate Category Calculator
Check your resting pulse against common adult ranges.
Blood Pressure Average Calculator
Average several home readings for a more reliable blood pressure picture.
Orthostatic Hypotension Check
Measure the blood pressure drop when you stand up.
Ankle-Brachial Index Calculator
Compare ankle and arm blood pressure to screen for leg artery disease.
hs-CRP Heart Risk Calculator
Classify high-sensitivity C-reactive protein as a cardiovascular risk marker.
Lipoprotein(a) Unit Converter
Convert Lp(a) between nmol/L and mg/dL.
HDL to LDL Ratio Calculator
Compare protective HDL with LDL cholesterol.
Triglyceride-Glucose (TyG) Index Calculator
Estimate insulin resistance from fasting triglycerides and glucose.
RR Interval to Heart Rate Calculator
Convert the time between heartbeats on an ECG into beats per minute.
Ejection Fraction Calculator
Percentage of blood the left ventricle pumps each beat.
LDL Reduction Percentage Calculator
Measure how much your LDL cholesterol has dropped.
Pulse Count Heart Rate Calculator
Work out heart rate from beats counted in 15 seconds.
AFib Stroke Risk (CHA₂DS₂-VASc) Calculator
Score stroke risk for people with atrial fibrillation.
Blood Pressure Variability Calculator
Measure how much your systolic readings vary from one to the next.
Cholesterol Unit Converter
Convert total cholesterol between mg/dL and mmol/L.
Child Resting Heart Rate Calculator
Compare a child’s resting heart rate with typical ranges for their age.
STOP-BANG Sleep Apnoea Screening
Screen for obstructive sleep apnoea with the eight-question STOP-BANG tool.
Smoking Cost & Savings Calculator
What smoking costs and what you save by quitting.
Sitting Time Calculator
How much of your waking day you spend sitting.
Quit Smoking Timeline Calculator
See how many days you have been smoke-free and the next health milestone.
Movement Break Planner
Plan how often to stand up during a day of sitting.
Pack-Years Calculator
Smoking history and lung cancer screening eligibility.
Other goals
- Lose weight
- Build muscle
- Eat better
- Get fitter
- Protect my heart
- Manage blood sugar
- Pregnancy & fertility
- Care for my child
- Sleep better
- Mental wellbeing
- Cut back on drink, smoke & caffeine
- Understand my lab results
Related guides
Why Belly Fat Matters More Than Weight
Visceral fat sits around organs and drives disease risk. Here is how to measure and reduce it.
Weight & Body CompositionWaist-to-Hip Ratio: Apple, Pear and Your Health
Where you carry fat influences disease risk. Learn how to measure and interpret the ratio.
Nutrition & DietFiber: Benefits, Sources and Daily Goals
Most adults eat only half the fiber they need. See why it matters and how to add it.