BMR Calculator - Free Health & Fitness Calculator | NexUtils
Free bmr calculator to track and improve your health goals. Get instant results and personalized insights. Easy to use and completely free.
BMR Calculator
Calculate BMR
Calculation History
No recent history.
About BMR Calculator
Your Basal Metabolic Rate (BMR) represents the number of calories your body burns at complete rest to maintain basic life functions such as breathing, circulation, and cell production. Knowing your BMR is the starting point for any weight management plan, whether you want to lose fat, gain muscle, or maintain your physique.
How to Use This Tool
Enter Details
Input your gender, age, weight, and height.
Select Activity
Choose your daily activity level (from sedentary to very active).
Calculate
Get your BMR (calories at rest) and TDEE (total calories used per day).
Plan
Use these numbers to set your daily calorie intake target.
Frequently Asked Questions
What is the difference between BMR and TDEE?
BMR is what you burn in a coma (at strict rest). TDEE includes BMR plus the calories you burn walking, working, and exercising. TDEE is your "maintenance calories".
Which formula is used?
We use the Mifflin-St Jeor equation, which is currently considered the most accurate formula for estimating BMR in healthy individuals.
How much should I eat to lose weight?
A common guideline is to eat 500 calories less than your TDEE per day to lose about 1 lb (0.5 kg) per week.
Key Features
- •Dual Calculation (BMR & TDEE)
- •Mifflin-St Jeor Equation (Most Accurate)
- •Activity Level Adjustments
- •Calorie Targets for Goals
- •Export History to PDF
Understanding BMR Calculator
The calculator uses the Mifflin-St Jeor equation: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) + s (where s is +5 for males and -161 for females).
Why BMR Calculator Matters
Provides the exact mathematical baseline you need to design a diet plan that actually works.
Limitations of BMR Calculator
While this tool is useful, keep in mind:
- Specific to average body composition (may underestimate for very muscular athletes).
- Activity levels are precise estimates, not exact measurements.