BMR Calculator

How does our BMR calculator work?

Your body uses energy, even when you're asleep. You need to replenish this energy with food.

Basal Metabolic Rate (BMR) is the number of calories your body needs each day to carry out essential functions like breathing, circulation and maintaining body temperature while at rest. It provides a useful starting point for understanding your daily calorie needs.

Our BMR calculator can help you estimate the number of calories you need to fuel your body.

Your BMR score gives you an estimate of how many calories your body needs each day. This can help you manage your calorie intake, plan your exercise routine and work towards your health goals.

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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 a higher proportion of lean muscle mass.

Sex

Show more about Why do we ask your sex? Show less about Why do we ask your sex?

Why do we ask your sex?

Adult males often have more muscle mass than females of the same size and age. Therefore males have a higher BMR as muscle tissue requires more energy to maintain than fat tissue.

Calculating BMR for Transgender people  

To calculate BMR, individuals can select the sex that most closely aligns with their stage in transition.

Male
Female

Age

For example, 57

Height in Feet

Height in Inches

Weight in Stones

Weight in Pounds

The results given are not applicable to those who are pregnant, have a long-term disease or illness, or suffer from an eating disorder.

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 an estimation of the energy required to maintain essential functions at rest.

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.

Find out more about how this is calculated

Sedentary BMR - 0

You're inactive and do little or no exercise per day.

Lightly Active BMR - 0

You're getting the steps in and do light exercise 1-3 times a week.

Moderately Active BMR - 0

You like to break a sweat and do moderate exercise 4-5 times a week.

Very Active BMR - 0

You're more hare than tortoise and do hard exercise 6-7 times a week.

Extra Active BMR - 0

You're seriously pushing for the burn and do intense exercise every day.

The results given are not applicable to those who are pregnant, have a long-term disease or illness, or suffer from an eating disorder.

How do you calculate BMR?

We’ve used the Mifflin-St Jeor equation, which calculates BMR as follows:

Men: (10 x weight in kg) + (6.25 x height in cm) - (5 x age in years) + 5
Women: (10 x weight in kg) + (6.25 x height in cm) - (5 x age in years) - 161

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