Basal Metabolic Rate (BMR)

Estimated resting daily energy expenditure.

Mifflin-St Jeor

Patient parameters

Adjust values, then click Calculate.

Age

0–120

Sex

Height (cm)

30–250

Weight (kg)

1–300

Results

BMR: 1568 kcal/day

What this calculator does

Basal metabolic rate (BMR) estimates the calories your body would burn at complete rest over 24 hours. The Mifflin–St Jeor equation is commonly used in nutrition counseling because it performs well across diverse adult populations.

Formula and variables

Displayed formula: Mifflin-St Jeor

The engine evaluates: BMR (kcal/day). Variable names match the input field keys so you can trace each step from entry to output.

How to use this tool

1. Open the Basal Metabolic Rate (BMR) and enter your values using the units shown beside each field.
2. Review that inputs are within the typical physiological range before you calculate.
3. Read the result together with the interpretation notes below and your local clinical context.

How to interpret the result

Typical adult BMR often falls between roughly 1,200 and 2,000 kcal/day depending on size, age, and sex. Values far outside expected ranges usually reflect data entry errors or atypical physiology.

Clinical context

Anthropometric indices support screening and counseling. They should be interpreted with diet history, activity, medications, and culturally appropriate goals.

Limitations and disclaimer

This tool supports education and clinical triage only. It does not replace professional medical advice, diagnosis, or treatment. Reference ranges vary by laboratory, age, pregnancy status, and comorbidity. Always confirm critical decisions with institutional protocols and qualified clinicians.