BMR Calculator
Calculate your BMR in seconds with our free online calculator. Get your resting metabolic rate and start your fitness journey.
BMR = /day
| Activity Level | Calorie |
|---|---|
| Sedentary: little or no exercise | |
| Exercise 1-3 times/week | |
| Exercise 4-5 times/week | |
| Daily exercise or intense exercise 3-4 times/week | |
| Intense exercise 6-7 times/week | |
| Very intense exercise daily, or physical job |
Intense exercise: 45-120 minutes of elevated heart rate activity.
Very intense exercise: 2+ hours of elevated heart rate activity.
📋How to Use Basal Metabolic Rate Calculator?
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Provide age, gender, weight, and height.
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Choose metric or imperial units.
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Click "Calculate" to get your basal metabolic rate.
To use the online BMR calculator, enter your age, sex, height, and weight into the calculator and select what units you would like it in (metric or imperial). Click "Calculate" because this will determine your basal metabolic rate. Your basal metabolic rate is the amount of calories your body expends at rest and includes looking at the basic functions (breathing and circulation). The BMR value will be based on a formula such as Mifflin.St Jeor, which helps you measure the calories you want to consume for a variety of reasons like weight loss, maintenance, or fitness goals and provide a starting point for personalized nutritional strategies.
Useful Tips💡
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Enter your true age and weight for accurate BMR.
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Use BMR as a baseline for daily calorie planning.
Factors Influencing BMR
BMR is the minimum calories your body needs to function. Factors like increased muscle mass from weightlifting can raise it, while age or inactivity may lower it. Other influences include diet (e.g., caffeine), pregnancy, frequent small meals, or extreme temperatures. Malnourishment can reduce BMR by up to 30%. These affect your daily energy needs.
Practical Applications📊
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Estimate resting calorie needs for weight management.
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Integrate with our TDEE Calculator for daily calorie planning.
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Track changes in BMR with regular weight or muscle updates.
Questions and Answers
What is a BMR calculator?
BMR calculator is a tool which measures the basal metabolic rate or calories burned while your body is at rest. It calculates using age, weight, height, and gender so that it meets your BMR needs for planning weight loss or fitness goals.
How to Calculate BMR for Weight Loss?
To lose weight effectively, it is important to create a caloric deficit, consume lower calories than your BMR and activity levels. To achieve that step, input your details into our tool and the result shows your resting calorie burn.
What is the Mifflin St Jeor Equation?
Mifflin St Jeor is arguably the best-known Basal Metabolic Rate calculating equation. It uses weight, height, age, and even gender to provide the most accurate MBR estimate you can possibly get, enabling tailored fitness plans.
How does a resting metabolic rate calculator work?
Just like our online BMR Calculator, a resting metabolic rate calculator calculated all of the calories burned while on rest. You just have to input your details, and it utilizes the Mifflin St Jeor formula to estimate your daily caloric needs.
Which formulas are used in BMR Calculator?
The basal metabolic rate calculator uses the Mifflin-St Jeor Equation to determine your Basal Metabolic Rate (BMR) considering age, weight, height, and gender. This formula is the most accurate for estimating these parameters and is specifically designed for metabolic research guaranteeing results when planning daily energy expenditure at rest. Its accuracy has been validated by the National Institutes of Health (NIH) through clinical research.
How does weight change affect my BMR?
Weight loss usually decreases BMR (because there is less body mass), and muscle gain typically increases BMR (due to more body mass). When you sustain or experience a significant change in weight (such as every 10–15 lb), recalculate your BMR and adjust your caloric needs. You can get a full 24-hour caloric estimate by using our TDEE Calculator.
Can I use BMR to maintain my current weight?
Yes, BMR represents the number of calories you use at rest. If you want to maintain your weight, add calories on top of your BMR for daily activities (as determined by our TDEE Calculator) and consume that caloric total. Depending on your lifestyle changes, you will need to adjust your caloric intake, while also monitoring your weight regularly to find the right balance.