Health Calculators

Health Calculators use published clinical formulas — BMI and body composition equations, the Framingham cardiovascular risk model, WHO life tables — to turn your own numbers into an estimate you can act on. They're built for anyone tracking a fitness goal, assessing a personal health risk factor, or planning around a life stage like pregnancy or a child's growth. These are educational estimates based on population-level research, not a diagnosis — always talk to a doctor about your specific health.

Body & Fitness

Track weight, body composition, and daily calorie and hydration targets.

BMI & Body Weight Calculator

Calculate your BMI, healthy weight range, BMR and daily calorie needs by activity level.

Body Fat Percentage Calculator

Calculate your body fat %, fat mass, and lean mass using the Deurenberg and US Navy metho…

Calorie Burn Estimator

Estimate calories burned during exercise, and see it in relatable terms.

Diet Outcome Estimator

Estimate your BMR, TDEE, and projected weight-change timeline using Mifflin-St Jeor and e…

Daily Water Intake Calculator

Estimate your recommended daily water intake, based on EFSA/NHS guidelines.

Sleep Cycle Calculator

Time your sleep to 90-minute cycles, so you wake up feeling rested, not groggy.

Running Pace Calculator

Calculate your running pace, finish time, per-km splits, and training zone paces for any…

Health Risk Assessments

Validated clinical risk scores for cardiovascular disease, diabetes, dementia, and lifestyle factors.

10-Year Heart Disease Risk Calculator

Estimate your 10-year cardiovascular disease risk using the published Framingham General…

Diabetes Risk Score Calculator (FINDRISC)

Take the validated Finnish Diabetes Risk Score to estimate your 10-year probability of de…

Dementia Risk Calculator (LIBRA Score)

Assess your dementia risk across 12 scientifically validated, modifiable lifestyle factor…

Alcohol Health Impact Calculator

Estimate the health impact of your weekly alcohol consumption, based on WHO dose-response…

Biological Age Estimator

See how your lifestyle stacks up against your chronological age.

Longevity Estimator

Estimate life expectancy from WHO baselines adjusted for your lifestyle.

Life Stages & Family

Pregnancy, child growth, and life-event and longevity probability tools.

Due Date & Pregnancy Milestones

A gentle estimate of your due date and the key milestones ahead.

Child Height Predictor

Estimate your child's likely adult height, and see their current growth percentile.

Lifetime Event Probability Calculator

How likely are you to experience 10 notable life events — ranked using real actuarial dat…

Survival Probability Calculator

Estimate your probability of reaching a target age.

Cohort Size Calculator

Estimate how many people share your birth year, today and in the future.

Pet Age Calculator

Convert your dog or cat's age to human years using AAFP/AAHA veterinary life-stage guidel…

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