This Mifflin St Jeor calculator finds your BMR and estimated daily calorie needs using the Mifflin-St Jeor equation, the formula clinicians most often prefer. Enter your details above.
Formula
Men: BMR = 10×W + 6.25×H − 5×age + 5 Women: BMR = 10×W + 6.25×H − 5×age − 161 Daily calories = BMR × activity factor (1.2-1.9)
Example
Woman, 80 kg, 180 cm, 30 years: BMR = 1,614 kcal/day.
Important
This tool is for general educational purposes only and is not medical advice, diagnosis, or treatment. It does not replace evaluation by a qualified healthcare professional — consult one for any health decision. Last updated: August 2026.
Frequently Asked Questions
What is the Mifflin-St Jeor equation?
A widely used formula that estimates basal metabolic rate from weight, height, age, and sex, published in 1990.
Is Mifflin-St Jeor better than Harris-Benedict?
It is generally considered more accurate for modern populations, which is why clinicians often prefer it.
How do I use it for weight loss?
Estimate daily calories, then create a moderate deficit; consult a professional for a safe plan.