Katch-McArdle Calculator

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Use the Body Fat Calculator if unsure.
Health Updated 14 Jun 2026

Katch-McArdle Calculator is a health and wellness calculator that helps you calculate katch-mcardle values from your input data. The formula used is: BMR = 370 + (21.6 × LBM)\nLBM = body weight × (1 − body fat % / 100). Enter values using the units shown next to each input field (e.g. kg, cm, years).

Formula

BMR = 370 + (21.6 × LBM) LBM = body weight × (1 − body fat % / 100)
  • Katch-McArdle Calculator gives you a fast estimate using your inputs and updates instantly when you change any value.
  • Formula: BMR = 370 + (21.6 × LBM)\nLBM = body weight × (1 − body fat % / 100)
  • Input definitions: • Body Weight: the numeric body weight used in the calculation • Body Fat Percentage: the numeric body fat percentage used in the calculation
  • Manual method: write down each input, apply the formula step by step, then compare your manual result with the calculator output.
  • Enter values using the units shown next to each input field (e.g. kg, cm, years).
  • This calculator uses widely accepted health formulas and returns screening estimates only. It does not replace a diagnosis from a qualified healthcare professional.
  • Compare your result with published reference ranges. Values outside the normal range warrant a conversation with your doctor.
  • Practical tip: test a low, medium, and high scenario to understand sensitivity before making decisions.

Example Calculation

Inputs
  • Body Weight: 80 kg
  • Body Fat Percentage: 20 %

Suppose you enter: Body Weight = 80, Body Fat Percentage = 20. The calculator applies the formula (BMR = 370 + (21.6 × LBM)\nLBM = body weight × (1 − body fat % / 100)) and shows all output values below. Change any input field to immediately see how the result changes.

Frequently asked questions

What is the Katch-McArdle?
The Katch-McArdle Calculator is a health and wellness calculator that helps you calculate katch-mcardle values from your input data. Enter values using the units shown next to each input field (e.g. kg, cm, years).
When should I use this calculator?
Use this calculator whenever you need a quick, accurate result for katch-mcardle values from your input data without working through the arithmetic manually.
What units should I enter?
Enter values using the units shown next to each input field (e.g. kg, cm, years).
How accurate are the results?
This calculator uses widely accepted health formulas and returns screening estimates only. It does not replace a diagnosis from a qualified healthcare professional.
How do I interpret the result?
Compare your result with published reference ranges. Values outside the normal range warrant a conversation with your doctor.
How can I verify the calculation manually?
Use the displayed formula and work through the numbers step by step. If your manual result differs slightly, check rounding and unit conversions first.
Can I use this for planning and budgeting?
Yes. Run best-case, expected, and worst-case inputs to compare outcomes and make safer planning decisions.

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