BMR Calculator (Mifflin-St Jeor): Find Your BMR

BMR — Basal Metabolic Rate (Mifflin–St Jeor)

Estimate your basal metabolic rate (kcal/day). Fields with 🔹 update live.

⚧ Sex

Male Female

Required for the ± constant in the equation.

🎂 Age years

Enter full years. 🔹

📏 Height ?

Provide either centimeters or feet+inches. 🔹

⚖️ Weight ?

Enter body weight in your preferred unit. 🔹

🧬 Basal Metabolic Rate (BMR)

Mifflin–St Jeor estimate in kcal/day.

⚡ Quick summary

Fill all inputs to see your personalized summary.

Step-by-step derivation

Provide inputs to see the working with your numbers.

Mifflin–St Jeor reference

Formula (kcal/day):

BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age(y) + s

with s = +5 (male), s = −161 (female).

Sources

• Mifflin MD, St Jeor ST, et al. “A new predictive equation for resting energy expenditure in healthy individuals.” AJCN, 1990.
• General dietetics references for BMR vs. TDEE concepts.

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