Bmr Calculator Uk Imperial

Mifflin-St Jeor Equation (Imperial Units):

\[ BMR = 10 \times (weight \times 0.4536) + 6.25 \times (height \times 2.54) - 5 \times age - 161 \]

Basal Metabolic Rate (BMR):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation is a widely used formula for estimating basal metabolic rate (BMR) - the number of calories your body needs at rest to maintain basic physiological functions. This version uses imperial units (pounds and inches) that are converted to metric for calculation.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation with imperial units:

\[ BMR = 10 \times (weight \times 0.4536) + 6.25 \times (height \times 2.54) - 5 \times age - 161 \]

Where:

\( weight \) — Body weight in pounds (lb)
\( height \) — Height in inches (in)
\( age \) — Age in years
0.4536 — Conversion factor from pounds to kilograms
2.54 — Conversion factor from inches to centimeters

Explanation: The equation converts imperial measurements to metric, then calculates the basal metabolic rate based on weight, height, and age.

3. Importance of BMR Calculation

Details: Knowing your BMR is essential for creating effective weight management plans, determining daily caloric needs, and establishing appropriate nutrition goals for health and fitness.

4. Using the Calculator

Tips: Enter weight in pounds, height in inches, and age in years. All values must be valid (weight > 0, height > 0, age between 1-120). For accurate results, use current measurements.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between BMR and TDEE?
A: BMR represents calories burned at complete rest, while TDEE (Total Daily Energy Expenditure) includes all daily activities and exercise.

Q2: How accurate is the Mifflin-St Jeor equation?
A: It's considered one of the most accurate BMR equations for the general population, with about 90% accuracy for most individuals.

Q3: Why does the equation subtract 161?
A: This is the standard constant in the Mifflin-St Jeor equation that helps account for metabolic differences and provides more accurate results.

Q4: Should I use imperial or metric measurements?
A: This calculator is specifically designed for imperial units (UK measurements). Use whichever system you're most comfortable with, but be consistent.

Q5: How often should I recalculate my BMR?
A: Recalculate whenever your weight changes significantly (5+ pounds) or every 3-6 months to account for natural metabolic changes.