Health calculators
for Australians.
Know your numbers. These tools calculate the body metrics and fitness benchmarks that help you make informed decisions about your health — explained clearly, with context, and without judgement.
5 tools available
All health calculators
BMI Calculator
PopularCalculate your body mass index and see what it means for your health.
Open calculator →Ideal Weight Calculator
Estimate your healthy weight range based on height, age, and frame size.
Open calculator →Heart Rate Zones
Find your five training zones based on age and resting heart rate.
Open calculator →Calorie & Macro Calculator
NewCalculate your daily calorie needs and macronutrient targets.
Open calculator →Pregnancy Calculator
NewFind out how many weeks pregnant you are, your due date, and upcoming milestones.
Open calculator →Why use these tools
Built for the real decision, not the generic one.
Multiple formulas, honest results
Where multiple calculation methods exist (like ideal weight), we show you the range across formulas rather than picking one arbitrarily.
Australian health context
BMI ranges, weight guidelines, and health risk thresholds are presented with reference to Australian health authority guidance — not US benchmarks.
Screening tools, not diagnoses
Every calculator is honest about what it can and can't tell you. BMI is a screening tool, not a health verdict — we say so clearly.
Training zones that actually work
Heart rate zones calculated from your age and resting heart rate using the Karvonen formula — more accurate than age-only estimates.
Macros for your goals
Calorie and macro targets calculated for weight loss, maintenance, or muscle gain — adjusted for your activity level and body composition.
Completely private
Your height, weight, and health data never leaves your browser. Nothing is stored, logged, or shared. Ever.
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