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Katch-McArdle Formula:
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The Katch-McArdle formula is considered one of the most accurate methods for calculating Basal Metabolic Rate (BMR) as it accounts for an individual's body composition by incorporating lean body mass rather than total body weight.
The calculator uses the Katch-McArdle formula:
Where:
Explanation: The formula first calculates lean body mass by subtracting fat mass from total weight, then uses this lean mass to determine the basal metabolic rate.
Details: Knowing your BMR is essential for creating effective nutrition plans, whether for weight loss, maintenance, or muscle gain. It represents the number of calories your body needs at complete rest to maintain basic physiological functions.
Tips: Enter your weight in kilograms and body fat percentage. For accurate results, use a recent body composition analysis from methods like DEXA scan, bioelectrical impedance, or skinfold measurements.
Q1: Why use Katch-McArdle instead of other BMR formulas?
A: Katch-McArdle is more accurate for individuals with known body fat percentages as it accounts for muscle mass, which is more metabolically active than fat tissue.
Q2: What is a typical BMR range?
A: BMR varies significantly based on age, gender, weight, and body composition. Generally, it ranges from 1200-2000 kcal/day for adults.
Q3: How often should I recalculate my BMR?
A: Recalculate whenever your weight or body composition changes significantly, typically every 4-8 weeks during a body transformation program.
Q4: Does this account for activity level?
A: No, this calculates only basal metabolic rate. To determine total daily energy expenditure, multiply your BMR by an activity factor (typically 1.2-1.9).
Q5: Is this formula suitable for everyone?
A: While generally accurate, it may need adjustment for extremely muscular individuals, the elderly, or those with certain medical conditions affecting metabolism.