BMR Calculator
Calculate your Basal Metabolic Rate (BMR) to know your minimum calorie needs.
How BMR is Calculated
- BMR (Basal Metabolic Rate) is the number of calories your body needs at rest to maintain vital functions.
- The Mifflin-St Jeor equation is widely used for BMR calculation.
Formula (Mifflin-St Jeor):
Male: 10 × weight (kg) + 6.25 × height (cm) − 5 × age (y) + 5
Female: 10 × weight (kg) + 6.25 × height (cm) − 5 × age (y) − 161
Learn more: Original Mifflin-St Jeor Study (NCBI)
How to Build a BMR Calculator
A BMR (Basal Metabolic Rate) calculator estimates the minimum calories your body needs at rest. Here’s how you can build one:
Best Practices
- Use the Mifflin-St Jeor equation for accuracy and modern relevance.
- Require inputs for age, gender, height, and weight for precise results.
- Display results in kcal/day and explain what BMR means for users.
- Encourage users to use BMR as a baseline for TDEE and calorie planning.
Example Calculation
Scenario: 28-year-old male, 180 cm, 75 kg
BMR: 10×75 + 6.25×180 − 5×28 + 5 = 1,770 kcal/day
Real-World Usage
- Use your BMR to estimate your daily calorie needs for weight maintenance, loss, or gain.
- Multiply your BMR by your activity factor to get your TDEE (Total Daily Energy Expenditure).
- Consult a healthcare professional before making significant dietary changes.
Frequently Asked Questions
BMR stands for Basal Metabolic Rate—the minimum number of calories your body needs to function at rest.
Knowing your BMR helps you plan your calorie intake for weight maintenance, loss, or gain.
Use your BMR as a baseline to estimate your Total Daily Energy Expenditure (TDEE) by multiplying by your activity level.