Health calculators

These calculators give general estimates for adults, using widely recognised formulas. They are screening and planning tools, not diagnoses, and they cannot replace advice from a doctor or registered dietitian who knows your circumstances.

The BMI calculator applies the standard adult categories, while the calorie calculator estimates your resting and daily energy needs from your size, age and activity. If a result surprises you or worries you, use it as a prompt to talk to a health professional rather than a reason to make big changes on your own.