Health tools
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.
9 tools available
All health tools
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 →Body Fat Percentage Calculator
NewEstimate your body fat percentage using the US Navy tape method or BMI formula.
Open calculator →BMR Calculator
NewCalculate your basal metabolic rate and total daily energy expenditure using three formulas, with calorie targets by goal.
Open calculator →Calorie Deficit Calculator
NewSet your goal weight and weekly loss rate to get a daily calorie target, realistic timeline, and suggested macros.
Open calculator →Water Intake Calculator
NewGet your personalised daily water intake target based on weight, age, activity level, climate, and pregnancy or breastfeeding status.
Open calculator →Start with the right question
Contextual paths through the health cluster
Metabolism, calories, and body composition
These tools work best together when you're trying to understand maintenance calories, body-composition context, and whether a fat-loss target is realistic.
Training and everyday health markers
Use these when the question is less about calories and more about training zones, hydration, benchmark ranges, or life-stage planning.
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.
Looking for something else?
Browse all other categories — money, travel, moving, exercise, health, and wellness.