Katch-McArdle BMR for 45 kg Lean Body Mass
A lean body mass of 45 kg gives a Katch-McArdle BMR of about 1,173 kcal/day.
How to use this tool
- Enter lean body mass in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your bmr and the full breakdown beneath it.
Use this calculator to determine your resting metabolic rate based on your lean mass rather than total body weight.
Frequently asked questions
- What makes Katch-McArdle different from Mifflin-St Jeor?
- Katch-McArdle uses lean body mass rather than total body weight, so it is more accurate for people who know their body fat percentage. Mifflin-St Jeor only needs weight, height, age, and sex.
- How do I find my lean body mass?
- Subtract fat mass from total weight. Use our Lean Body Mass Calculator to estimate LBM from height, weight and sex using the Boer formula.