Question 1

What is a healthy BMI for Australians?

Accepted Answer

The healthy BMI range for most adults is 18.5–24.9. A BMI of 25–29.9 is considered overweight, and 30+ is obese. However, BMI doesn't account for muscle mass, bone density, or body fat distribution — so use it as a starting point rather than a definitive measure. Athletes and older adults may have different healthy ranges.

Question 2

How many calories should I eat per day?

Accepted Answer

Your daily calorie needs depend on your weight, height, age, sex, and activity level. The Calorie & Macro Calculator uses the Mifflin-St Jeor formula to calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE), then gives you a calorie target based on your goal — maintain, lose, or gain.

Question 3

What are the best exercises for overall health?

Accepted Answer

Australian physical activity guidelines recommend 150–300 minutes of moderate aerobic activity per week (or 75–150 minutes vigorous), plus muscle-strengthening activities twice a week. For overall health, a mix of walking, swimming, resistance training, and cycling covers cardiovascular fitness, strength, and bone density.

Question 4

How much sleep do adults need?

Accepted Answer

Most adults need 7–9 hours of sleep per night. Quality matters as much as quantity — interrupted or poor-quality sleep can have the same health impact as short sleep. The Sleep Calculator helps you find the optimal bedtime based on 90-minute sleep cycles so you wake at the end of a cycle feeling refreshed.

Question 5

How much water should I drink daily?

Accepted Answer

General guidelines suggest around 2–3 litres per day for adults, but your ideal intake depends on your weight, activity level, climate, and whether you're pregnant or breastfeeding. The Water Intake Calculator gives you a personalised daily target. Hot Australian summers and vigorous exercise significantly increase your needs.

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BMI Calculator