A free tool that estimates the number of calories your body burns at complete rest (Basal Metabolic Rate) - the foundation for building any calorie, weight loss, or muscle gain plan.
Select your activity level to calculate TDEE
Mifflin–St Jeor estimate:
Men: BMR = 10W + 6.25H − 5A + 5
Women: BMR = 10W + 6.25H − 5A − 161The calculator applies the selected body, age, activity and goal assumptions to a standard planning equation. Actual needs vary with health status, climate, training, medication, food measurement and changes in body weight or activity.
A BMR calculator computes how many calories a person’s body expends a day solely based on the human resting, non-physical, physiological state. This calculation represents calorie expenditures that are required just to keep the lungs working, ensure the blood circulate, the organs go on as planned, the nerves and brain perform properly, cells mend, and even one remains dormant 24-hour a day (i.e., never moving, walking or anything active).
It matters to know your BMR because this is what a calorie or diet is based on. Whether your a nutritionist, a personal trainer, someone on a weight loss or weight gain programme or just someone interested in their metabolism, they all start with this number and then add on your activity level.
What is a BMR calculator? A BMR calculator is simply a first step to many health and fitness goals:
For instance, if you have calculated that you have a BMR of 1500, then you are certain that your body will take 1500 calories simply to perform its basic functions, even before walking around and undertaking physical activities.
As we age, our basal metabolic rate gradually decreases due to a reduction in body mass and cell efficiency, resulting in less calories burned during rest.
Because they generally carry a more muscle on less body fat they tend to find a high metabolism at a high weight.
Since muscle tissue burns more calories than fat tissue, an individual with greater muscle mass will burn more calories even without working out.
An individual of this stature will have more body tissues/ cells that needs cells. And this translate a higher metabolic rate/ requirements for the body simply to maintain cell functions.
There are also individual differences, naturally born with either high or low metabolism influenced by the body's inherent functions that result in consuming higher or lower calorie levels in comparison to those with similar physique.
BMR is controlled by metabolic hormones, thyroxin from the thyroid gland, thus, changes may significantly increase or decrease BMR."Thyroid hormones control metabolic rate"
Extreme cold can increase BMR slightly as it has to expend more energy to keep the internal temperature at a normal level.
Prolonged caloric deficits can result in a lowered BMR as the body adapts to conserve energy (sometimes known as metabolic adaptation).
BMR (Basal Metabolic Rate) is how many calories you burn at total rest. It is important because it is the starting point for working out how many calories you need daily and creating any weight loss or muscle gain plan.
BMR is the number of calories you burn at rest. TDEE is BMR plus any calories burned through activity, exercise and digestion. TDEE therefore provides a more accurate picture of actual energy requirements.
Bmr Is Almost Always Assessed According to the Mifflin-St Jeor Equation Which Incorporates height,weight, sex, and the age of the Individual This is most commonly assumed as having improved accuracy compared to previous methods for adult individuals
Yes. Increasing muscle mass via strength training is one of the most potent ways to increase BMR, as muscle mass burns more calories at rest than fat mass.
A prolonged period of serious calorie deficits will cause your body to reduce its BMR. This why you won’t be losing a lot in a while on crash diets.
More like, it’s half of it. BMR measures how your body burns energy at rest. In reality, you are also using up a lot of extra calories to digest your food, exercise, and generally be on the move.
Use current measurements and a realistic activity level. Follow the estimate consistently, monitor results over time and adjust only after comparing actual progress, hunger, performance and professional guidance.
Most modern BMR calculators use the Mifflin-St Jeor equation, which replaced the older Harris-Benedict formula because it's been shown to be more accurate for the average adult.
The formulas look like this:
For example, a 30-year-old woman who weighs 65 kg and is 165 cm tall would have a BMR of roughly 1,401 calories per day. That's the energy her body needs just to keep functioning at complete rest, before any walking, exercise, or daily activity is added.
| Term | What It Measures | Includes Activity? |
|---|---|---|
| BMR | Calories burned at complete rest | No |
| RMR | Calories burned at rest, slightly higher than BMR | No |
| TDEE | Total calories burned in a full day | Yes |
BMR is just the starting point. To find out how many calories you actually burn in a day, you multiply your BMR by an activity multiplier, ranging from 1.2 for a sedentary lifestyle to 1.9 for very intense daily training.
How to Use Your BMR for Weight GoalsKnowing your BMR is only useful if you apply it correctly. Here's how to turn that number into an actual eating plan:
however each individual's BMR varies, therefore pay attention to these if you're interested in your metabolism:
May also be indicative of thyroid problems, or other hormonal problems that could impact your metabolism - and can be tested by a doctor.