Three clinically-grounded tools to understand your body. Pick one to get started.
Personalised Body Mass Index results.
No sign-up. No tracking. Just clarity.
| Category | BMI Range |
|---|---|
| Underweight | Below 18.5 |
| Normal weight | 18.5 – 24.9 |
| Overweight | 25.0 – 29.9 |
| Obese | 30.0 and above |
Body Mass Index is a simple ratio of weight to height used by health professionals worldwide as a first-pass screening tool. BMI is calculated as weight (kg) divided by height squared (m²). While useful, it doesn't distinguish between muscle and fat — which is why we use your age and sex to personalise your result.
Your personalised daily calorie target.
Based on age, activity and your goal.
| Group | Calories/day |
|---|---|
| Women (sedentary) | 1,600 – 2,000 |
| Women (active) | 2,000 – 2,400 |
| Men (sedentary) | 2,000 – 2,600 |
| Men (active) | 2,600 – 3,000 |
This calculator uses the Mifflin-St Jeor equation — the most accurate formula for estimating Basal Metabolic Rate (BMR). That number is multiplied by your activity factor to give your Total Daily Energy Expenditure (TDEE), then adjusted ±500 calories for your goal.
Estimate your body fat percentage using
clinically-validated measurement methods.
The US Navy method uses circumference measurements to estimate body fat with accuracy comparable to skinfold calipers. The BMI-based method uses the Deurenberg formula correlating BMI with body fat, accounting for age and sex.