Your body uses energy, even while you’re sleeping, and this energy needs to be replenished through eating for the body to survive. Basal metabolic rate (BMR) is the minimum number of calories your body needs to maintain those basic, life-sustaining functions such as breathing, digestion, and blood flow. It is, in essence, your metabolism.
Our BMR calculator can help you determine how many calories you want to burn or consume based on your BMR score, exercise routine and health goals, as well as giving you a better understanding of your body.
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Calculate your BMR
The easiest way to calculate your BMR is through an equation that estimates the amount of energy you expend per day at rest
To get started, input your personal details in the adjacent box and click ‘calculate’ to get your score and an insight into your metabolism.
What affects BMR?
Your BMR is based on factors such as age, sex, height, weight, and how much exercise you do. The more active you are the more calories you’ll require to get through the day.
Gender can also play a role in BMR, as males tend to burn more calories than females due to higher muscle mass.
Your BMR results
The results are in! We’ve used the Mifflin-St Jeor equation to calculate your daily calorie needs.
Remember, whilst the amount of calories is one important factor, it's also important that your diet is nutritious and well-balanced. Processed foods, alcohol, and saturated fats like ice-cream can be fun to eat but aren’t good sources of calories for your body.
Your BMR is
0 kcal per day
This is your minimum daily calorie needs.
Your body burns calories even when you're at rest, and this Basal Metabolic Rate (BMR) score is calculated on the assumption that you're lying in bed all day.
To get a true indicator of your metabolic activity you'll have to factor in how much exercise you do in your daily life.
Below is the BMR calculation based on your activity level.
We’ve used the Mifflin-St Jeor equation, which calculates BMR as follows:
Men: (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) + 5 Women: (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) - 161
So, a 40 year old female who stands 5’5’’ (165.1cm) and weighs 135.1 lbs (61.3kg) would have a BMR of 1300kcal, which is the minimum number of calories she would need to eat in a day to maintain her weight.
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