Katch-McArdle Formula Calculator
This calculator helps you find your Basal Metabolic Rate (BMR) using the Katch-McArdle formula, which is ideal for individuals with a known body fat percentage. It is primarily used by fitness enthusiasts and nutritionists to tailor dietary plans.
Calculator
Results
Data Source and Methodology
All calculations are strictly based on the Katch-McArdle formula and data from scientific studies. Learn more.
The Formula Explained
Glossary of Terms
- Weight (kg): Your body weight in kilograms.
- Body Fat Percentage (%): The percentage of your body weight that is fat.
- BMR: Basal Metabolic Rate, the number of calories your body needs to maintain basic physiological functions.
How It Works: A Step-by-Step Example
Consider a person weighing 70 kg with 20% body fat. The calculation would be:
BMR = 370 + 21.6 × (1 - 0.20) × 70 = 370 + 21.6 × 0.80 × 70 = 370 + 1209.6 = 1579.6 kcal/day.
Frequently Asked Questions (FAQ)
What is BMR?
BMR stands for Basal Metabolic Rate and represents the number of calories your body needs to perform basic life-sustaining functions.
Why is the Katch-McArdle formula used?
This formula is ideal for individuals with a known body fat percentage, providing a more personalized estimate of caloric needs.
How accurate is the Katch-McArdle formula?
While it's more accurate than general equations for those aware of their body fat percentage, individual results can still vary.
Can I use this calculator if I don't know my body fat percentage?
It's recommended to use a different formula if you don't have an accurate body fat percentage measurement.
How often should I recalculate my BMR?
Recalculate your BMR any time there's a significant change in your weight or body composition.