BMR Calculator
Basal Metabolic Rate using Mifflin-St Jeor formula.
Amortization schedule
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Showing first 12 of months.
Growth over time
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Introduction
BMR Calculator — Basal Metabolic Rate using Mifflin-St Jeor formula. Enter Gender, Age, Height (cm), Weight (kg) to get an instant, accurate result.
Formula
Mifflin-St Jeor equation: BMR = 10×weight(kg) + 6.25×height(cm) − 5×age + 5 (men) or −161 (women).
Step-by-step
- Enter the Gender.
- Enter the Age.
- Enter the Height (cm).
- Enter the Weight (kg).
- Click Calculate to see your result instantly.
Real-world example
Example: With Gender = male, Age = 30, Height (cm) = 175, Weight (kg) = 75, the BMR Calculator gives BMR: 1698.75.
Frequently Asked Questions
What is BMR used for?
It's the calories your body burns at complete rest — the starting point for calculating daily calorie needs (TDEE).
Why does the formula differ by gender?
Men typically have more lean muscle mass at the same weight, which the formula's constant accounts for.
What inputs does the BMR Calculator need?
You'll need to provide: Gender, Age, Height (cm), Weight (kg). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the BMR Calculator?
The BMR Calculator applies the formula exactly as calculated — Mifflin-St Jeor equation: BMR = 10×weight(kg) + 6.25×height(cm) − 5×age + 5 (men) or −161 (women). — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is this a medical diagnosis?
No. The BMR Calculator provides an estimate based on standard formulas and general population data, not a medical diagnosis or personalized clinical advice. Individual results can vary — consult a doctor or other qualified healthcare provider for medical concerns.
Is the BMR Calculator free to use?
Yes, the BMR Calculator is completely free, requires no signup, and runs instantly in your browser.
About the BMR Calculator
The BMR Calculator uses a real, verifiable formula — Mifflin-St Jeor equation: BMR = 10×weight(kg) + 6.25×height(cm) − 5×age + 5 (men) or −161 (women). — so results are accurate every time, not an approximation.