How it is calculated

We use the Mifflin-St Jeor equation, the most accurate everyday formula for resting energy needs. Men: 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5. Women: the same, − 161. The result is multiplied by your activity level (1.2 to 1.9) to give your total daily energy expenditure (TDEE). A 500 kcal daily deficit leads to about 0.5 kg (1 lb) of weight loss a week.