BMR Calculator
Enter sex, age, height and weight to estimate your Basal Metabolic Rate (kcal) with the Mifflin-St Jeor equation.
Input Data
Results
At a glance:Mifflin-St Jeor: men = 10×weight(kg) + 6.25×height(cm) − 5×age + 5; women = 10×weight + 6.25×height − 5×age − 161. Result is the daily calories needed to sustain basic bodily functions.
Formula
Men: BMR = 10×weightKg + 6.25×heightCm − 5×age + 5.
Women: BMR = 10×weightKg + 6.25×heightCm − 5×age − 161.
How to Use
- Select sex and enter age, height (cm) and weight (kg).
- Get your estimated daily Basal Metabolic Rate instantly.
Case Studies
30-yo male 170cm/65kg
BMR = 10×65 + 6.25×170 − 5×30 + 5 = 650 + 1062.5 − 150 + 5 = 1567.5 ≈ 1568 kcal/day.
FAQ
BMR vs TDEE?
BMR is the minimum at rest; TDEE multiplies BMR by an activity factor. This tool shows BMR only — pair it with activity to estimate TDEE.
Why −161 for women?
Sex differences in lean mass and hormones shift metabolism; −161 is the Mifflin-St Jeor correction for females.
More accurate than Harris-Benedict?
Studies generally find Mifflin-St Jeor closer to measured values, which is why this tool uses it.
Related Tools
References
Content reviewed by the Calculatorism editorial team. Results are for reference only; please refer to the relevant authorities for the official figures.