BMI Calculator
Calculate Body Mass Index with metric or imperial units, category, and healthy weight range.
BMR Calculator
Estimate basal metabolic rate with Mifflin–St Jeor and Harris–Benedict formulas.
Introduction
Basal Metabolic Rate (BMR) is the number of calories your body burns at rest to maintain vital functions. This calculator compares two widely used adult equations — Mifflin–St Jeor (often preferred today) and the revised Harris–Benedict formula — so you can see how estimates differ. Results help plan daily calorie targets when combined with activity level (see the Calorie Calculator).
Benefits
- Side-by-side formula comparison
- Foundation for TDEE and diet planning
Educational wellness tool only — not medical advice. Consult a qualified healthcare professional for personal decisions.
How It Works
- Select sex
- Enter age, height (cm), and weight (kg)
- Compare Mifflin–St Jeor and Harris–Benedict results
Formula Used
Mifflin–St Jeor and revised Harris–Benedict equations
Examples
Example: Male, 30y, 175 cm, 70 kg → Mifflin ≈ 1,645 kcal/day.
Frequently Asked Questions
Which formula should I use?
Mifflin–St Jeor is generally recommended for modern adult estimates.
Is BMR the same as TDEE?
No. TDEE multiplies BMR by an activity factor to estimate total daily energy expenditure.