TDEE Calculator (Katch-McArdle)
Estimate your Total Daily Energy Expenditure using the Katch-McArdle formula, based on lean body mass from your weight and body fat percentage.
Frequently asked questions
Is this tool free?
Yes. Calchemy tools are free to use in your browser.
Is my data uploaded?
No. The tools are designed to run locally in your browser unless clearly stated otherwise.
How is this different from the BMI & Calorie Calculator?
The BMI & Calorie Calculator uses the Mifflin-St Jeor formula, based on height, weight, age and sex. This tool uses the Katch-McArdle formula, which is based on lean body mass (from your body fat percentage) and can be more accurate if you know your body fat percentage.
Where do I get my body fat percentage?
From a body fat scale, skinfold calipers, a DEXA scan, or a reasonable visual estimate - accuracy of the result depends on the accuracy of this input.
This is not medical advice.
This calculator provides an estimate for general interest and is not a substitute for professional medical or nutritional advice.