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Mifflin-St Jeor BMR Calculator

This calculator estimates your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor Equation. It provides the number of calories your body needs at rest based on your age, gender, weight, and height—essential for weight management and nutrition planning.

Basal Metabolic Rate Estimator

Input Fields
w
kg
Your body weight in kilograms
h
cm
Your height in centimeters
a
years
Your age
If enabled, the result will update automatically when you change any value.

Mifflin-St Jeor Equation for BMR

Formula
$$\text{BMR (Men)} = 10 \cdot \text{weight (kg)} + 6.25 \cdot \text{height (cm)} – 5 \cdot \text{age (years)} + 5 \\[10pt] \text{BMR (Women)} = 10 \cdot \text{weight (kg)} + 6.25 \cdot \text{height (cm)} – 5 \cdot \text{age (years)} – 161$$


The Mifflin-St Jeor formula is a widely accepted method to calculate Basal Metabolic Rate (BMR), which is the amount of energy (in calories) your body requires to function at rest. It is more accurate than older methods and is frequently used in nutrition and fitness planning. Knowing your BMR can help you design a personalized diet or workout plan tailored to your metabolic needs.

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Resting Metabolic Rate (RMR)

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3 thoughts on “Mifflin-St Jeor BMR Calculator”

  1. Richard Tew says:
    12.04.2019 at 01:48

    3400 (English) calories for a woman, age 60, 133 lbs. 59″ tall?   I don’t think so…  Gotta bug somewhere

    Reply
    1. Kim Yuri says:
      17.06.2019 at 06:47

      Did you make sure you entered your weight in using lbs not kg?

  2. Cody Bowers says:
    11.03.2019 at 01:26

    “RMR is also known as BMR (basal metabolic rate)” A Resting Metabolic Rate is not the same as a Basal Metabolic Rate. The MSJR equation calculates the RMR, not the BMR. The Harris Benedict equation calculates the BMR. 

    Reply