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Educational only — not medical advice. See full disclaimer. Disclaimer

Medical disclaimer

This tool is for informational and educational purposes only. It does not constitute medical advice, diagnosis, or treatment. Always consult your doctor or qualified healthcare professional before making any health-related decisions. Results are estimates only.

Last medically reviewed: March 2026

Content last updated: March 30, 2026

BMR calculator

Basal metabolic rate is the energy you would burn at rest in 24 hours. We use the Mifflin–St Jeor equation, which tends to outperform older Harris–Benedict estimates in modern cohorts.

Live calculation

Sex

Estimated BMR

1370

kcal / day

How this BMR estimate changes with age (same formula)

Holding your current height, weight, and sex fixed, the Mifflin–St Jeor equation predicts lower BMR as age increases. This is not a population average curve. Educational illustration only — not a diagnosis or personal target.

Mifflin MD, St Jeor ST, et al. Am J Clin Nutr. 1990.

This tool is for informational and educational purposes only. It does not constitute medical advice, diagnosis, or treatment. Always consult your doctor or qualified healthcare professional before making any health-related decisions. Results are estimates only.

Sources, formulas & further reading

Based on: Mifflin–St Jeor basal metabolic rate equation (1990).

For additional clinical context, see independent references from the publishers below (WHO, CDC, PubMed, Medscape, ACE, ACOG, NIH, NCBI, USDA — as applicable).