Basal Metabolic Rate (BMR) Calculator
Calculate how many calories your body needs at rest to maintain basic physiological functions
Calculate Your BMR
Your Basal Metabolic Rate
This is the number of calories your body burns at complete rest to maintain basic physiological functions.
Daily Calorie Needs Based on Activity Level
About Basal Metabolic Rate
What is BMR?
Basal Metabolic Rate (BMR) is the number of calories your body needs to accomplish its most basic (basal) life-sustaining functions, including:
- Breathing
- Circulation
- Cell production
- Nutrient processing
- Protein synthesis
This accounts for about 60-70% of the calories you burn each day.
How is BMR Calculated?
The most accurate BMR calculation uses the Mifflin-St Jeor Equation:
For Women: BMR = 10 × weight(kg) + 6.25 × height(cm) – 5 × age(y) – 161
This formula is considered the most accurate for calculating BMR in healthy individuals.
Using Your BMR for Weight Management
Knowing your BMR can help you with weight management:
- Weight Loss: Consume fewer calories than your total daily energy expenditure
- Weight Maintenance: Consume calories equal to your total daily energy expenditure
- Weight Gain: Consume more calories than your total daily energy expenditure
Remember that these calculations provide estimates. Individual variations exist based on genetics, body composition, and other factors.
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Child Energy Requirements Calculator
Calculate the daily calorie needs for children based on age, gender, weight, and activity level
Calculate Energy Needs
Daily Energy Requirements
This is the estimated number of calories your child needs each day to maintain their current weight based on their activity level.
Maintenance Calories
Mild Weight Gain
Mild Weight Loss
About Child Energy Needs
What Are Energy Requirements?
Children’s energy requirements refer to the amount of calories needed to support growth, development, and daily activities while maintaining a healthy weight.
These needs vary based on:
- Age and gender
- Weight and height
- Growth rate
- Activity level
- Metabolic rate
Estimated Calorie Needs by Age
General guidelines for daily calorie needs (based on moderately active children):
Toddlers
Young Children
Pre-Teens
Teenagers
Note: These are general estimates. Individual needs may vary significantly.
Nutritional Tips for Children
Focus on nutrient-dense foods rather than just calorie count:
- Include a variety of fruits and vegetables
- Choose whole grains over refined grains
- Include lean proteins (fish, poultry, beans)
- Limit added sugars and processed foods
- Ensure adequate calcium for bone development
- Provide healthy fats for brain development
Remember that children’s appetites can vary day to day. Offer regular meals and healthy snacks.