Question 1

What is a good BMR?

Accepted Answer

There is no single "good" BMR — it depends on your age, sex, height, weight, and body composition. An average adult woman has a BMR of roughly 1,400–1,500 kcal/day, while an average man is around 1,600–1,800 kcal/day. Higher muscle mass increases BMR because muscle burns more calories at rest than fat.

Question 2

How is BMR calculated?

Accepted Answer

Our calculator uses the Mifflin-St Jeor equation, which is widely considered the most accurate formula for the general population. For men: (10 × weight in kg) + (6.25 × height in cm) − (5 × age) + 5. For women: (10 × weight in kg) + (6.25 × height in cm) − (5 × age) − 161.

Question 3

What is the difference between BMR and RMR?

Accepted Answer

BMR (Basal Metabolic Rate) is measured at complete rest in a controlled setting, typically after fasting. RMR (Resting Metabolic Rate) is measured under less strict conditions and is usually slightly higher. In practice, the two terms are often used interchangeably.

Question 4

Does BMR change as you age?

Accepted Answer

Yes. BMR naturally decreases with age, largely because people tend to lose muscle mass over time. After about age 20, BMR drops by roughly 1–2% per decade. Strength training is one of the most effective ways to preserve muscle and keep BMR higher as you age.

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