Health & Fitness Calculators — Australia
Track your health metrics with science-based calculators — BMI, body composition, calorie needs, and environmental impact.
Body & Fitness
BMI Calculator — Body Mass Index Calculator
Calculate your BMI in Australia. See your category (underweight, healthy, overweight, o...
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Body Fat Percentage Calculator — Calculator
Calculate your body fat percentage using the US Navy circumference method. Enter waist,...
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Advanced BMI & Healthy Weight Calculator — Calculator
Calculate BMI, waist-to-hip ratio, waist-to-height ratio, and healthy weight range. Fou...
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Calorie Calculator — Daily Calorie Needs Calculator
Calculate your daily calorie needs using the Mifflin-St Jeor formula. See your BMR, TDE...
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Daily Water Intake Calculator
How much water to drink a day — from your bodyweight, exercise and climate, with the 8-glasses rule in context.
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One-Rep Max (1RM) Calculator
Estimate your one-rep max from any weight and reps — Epley, Brzycki and more — plus a %1RM training-load table.
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Heart Rate Zone Calculator
Your max heart rate and five training zones from age — with the Karvonen resting-HR method for personal zones.
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Running Pace Calculator
Pace, speed and even splits from a distance and time — plus 5K, 10K, half and marathon race predictions.
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Protein Intake Calculator
Your daily protein target in grams from bodyweight and goal, with a per-meal split and food equivalents.
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Ideal Weight Calculator
A healthy weight range for your height — Devine, Robinson, Miller and Hamwi formulas plus the BMI range.
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Pregnancy & Baby
Pregnancy Due Date Calculator
Estimate your due date from your last period, conception date or IVF transfer — with gestational age and trimester.
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Ovulation Calculator
Your fertile window and ovulation date from your last period and cycle length — with the best days to conceive.
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Lifestyle Impact
Cost of Smoking Calculator — Calculator
Calculate the annual and lifetime cost of smoking cigarettes in Australia. See the inve...
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Blood Alcohol (BAC) Calculator
Estimate blood alcohol concentration from standard drinks, weight and time — a rough guide, never a reason to drive.
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Carbon Footprint Calculator — Calculator
Calculate your annual carbon footprint in Australia. Includes electricity, car travel, ...
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About these calculators
These health calculators use peer-reviewed formulas and common health-planning assumptions. Health calculator outputs are estimates only and are not medical advice.