Health & Fitness
BMR Calculator (Mifflin–St Jeor Resting Energy)
Estimate basal metabolic rate using the Mifflin–St Jeor equation.
Preparing your result…
What this calculator does
Calculates BMR Calculator using the formula verified against the cited source.
What your result means
An estimate from the inputs you enter, within the scope stated below — not advice.
Formula
Mifflin–St Jeor REE (kcal/day) = 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5 (male) or − 161 (female)
The step-by-step working for your own numbers appears with the result above and in the PDF report.
Frequently asked questions
Symbols and assumptions
- Inputs
- The values entered in the fields above
- • Correction required. Mifflin–St Jeor resting energy estimate, kcal/day: 10×weight(kg)+6.25×height(cm)−5×age(years)+5 for males; replace +5 with −161 for females.
Sources and review
Reviewed 2026-10-18 · Next review 2027-04-18
- • Label REE/RMR estimate using Mifflin–St Jeor; original paper predicts resting energy expenditure, not a direct BMR measurement. Model was developed in healthy adults aged 19–78. Explicit units and sex coefficients required; not an individualized prescription for children/pregnancy or illness.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Quick reference
| Scenario | Weight (kg) | Height (cm) | Age (years) | Estimated resting energy (REE) |
|---|---|---|---|---|
| Worked example | 70 | 170 | 35 | 1,592.5 kcal/day |
| Half the amounts | 35 | 120 | 19 | 1,010 kcal/day |
| Double the amounts | 140 | 220 | 70 | 2,430 kcal/day |
Need the full picture? Get the detailed PDF report with charts, tables, formulas and working steps.
Reviewed 2026-10-18 · Next review 2027-04-18
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