Why is the Mifflin-St Jeor equation preferred over Harris-Benedict?

Modern clinical validation studies show the Mifflin-St Jeor equation estimates resting metabolic rate within 10% of measured calorimetry for both non-obese and obese adults.

CalcivoTools

BMR Calculator : Basal Metabolic Rate & Resting Caloric Burn

Your Basal Metabolic Rate (BMR) represents the baseline number of calories your body burns at complete rest to maintain vital functions like respiration, heartbeat, cell production, and brain activity.

Interactive Calculator

100% Client-Side Engine

Basal Metabolic Rate (BMR - Mifflin-St Jeor)

1,679 Calories / day

Harris-Benedict estimate: 1,734 kcal/day

Daily Maintenance

2,602 kcal

Weight Loss (-0.5 kg/wk)

2,102 kcal

Weight Gain (+0.5 kg/wk)

3,102 kcal

Step-by-Step Examples

30-Year-Old Male BMR at 180 cm and 75 kg

30-year-old male calculating baseline resting energy requirements.

Inputs: Gender: Male, Age: 30, Height: 180 cm, Weight: 75 kg

Result: BMR: 1,730 kcal/day

(10 × 75) + (6.25 × 180) - (5 × 30) + 5 = 750 + 1125 - 150 + 5 = 1,730 kcal/day.

How to Use This Tool

Select your biological gender and enter your age in years.
Input your exact height (cm or ft/in) and body weight (kg or lbs).
Click Calculate to compute your resting metabolic rate across validated clinical equations.

Frequently Asked Questions

BMR is the caloric energy expended at absolute rest to sustain life. TDEE (Total Daily Energy Expenditure) multiplies BMR by your daily physical activity level.

Mifflin-St Jeor BMR Equation

\text{BMR}_{\text{men}} = 10w + 6.25h - 5a + 5

Men: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) + 5. Women: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) - 161.

Calculation Standards

100% Client-Side: Evaluated in local memory with zero server data logging.
Verified Math: Built in accordance with verified standard formulas.
Instant Execution: Zero network latency or API round-trip delay.

More in Health

View All →

Notice & Disclaimer

Disclaimer: This calculation provides an estimate for educational and informational purposes only and is not a medical diagnosis. Always consult a qualified physician or healthcare professional before making health, dietary, or fitness decisions.

Related Calculators & Tools

Explore complementary calculators in this category.

Health

Calorie Calculator

Calculate exact daily calories required to maintain, lose weight (mild, standard, extreme), or gain muscle mass.

Verified Math0ms Latency

Health

BMI Calculator

Calculate your Body Mass Index (BMI) using metric or imperial units, discover your weight category and healthy weight range.

Verified Math0ms Latency

Health

Ideal Weight Calculator

Calculate your scientifically recommended ideal body weight based on height and biological gender using verified medical formulas.

Verified Math0ms Latency

Health

Water Intake Calculator

Calculate how much water you should drink each day in liters, ounces, and 8-oz glasses based on body weight, exercise, and climate.

Verified Math0ms Latency