Define your starting line

Mifflin-St Jeor Calculator

Estimate your resting metabolic rate (RMR) and total daily energy expenditure using the Mifflin-St Jeor equation.

Enter your details below and hit the Calculate button to generate your personalised values.

Age (years)
Assigned gender at birth
Bodyweight (kg)
Height (cm)
Calculate
Result incoming...

What do these values represent? 

Your Resting metabolic rate (RMR) is the estimated number of calories your body requires each day to maintain essential physiological processes at complete rest.

Remember:

✓ This is an estimate, not a direct measurement.

✓ Muscle mass, illness, injury and genetics can all influence your true metabolic rate.

✓ Energy requirements for training and recovery are substantially higher than your resting metabolic rate.

If you undertake ANY activity beyond laying in bed for 24hrs and breathing, your body will require more energy than your calculated resting metabolic rate. 

A note on the AGAB intersex option:

Selecting this option generates values using a modified version of the Mifflin-St Jeor equation that lie at the midpoint of the equation's published male and female versions. Your unique development pathway and activity choices will inform your energy demands more significantly than your AGAB, and this calculator seeks only to provide you with an estimated starting point for building your nutrition system. Inclusion of this option and the equation modification used is not intended as a comment or biological statement of physiological value. I chose to include the option and modification because all athletes deserve representation, support, and advocacy in their endeavours. If you'd like to work more closely with a gender issues and trauma informed performance nutritionist feel free to drop me a line. 

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