TDEE Calculator (Katch–McArdle, Body-Fat Based)
Maintenance energy keyed to lean mass — the TDEE method of choice when you know your body-fat percentage.
Because it keys on lean mass, this method gives the same BMR to a lean 90 kg lifter and a deconditioned 110 kg person with equal LBM — exactly the correction weight-based formulas need for athletic builds. Garbage-in applies: a smart-scale body-fat reading can be off by 5+ points.
Formula
For general information only — not medical or training advice. Estimates vary between individuals; consult a qualified professional before changing your exercise or nutrition routine.
Maintenance energy keyed to lean mass — the TDEE method of choice when you know your body-fat percentage. The TDEE Calculator (Katch–McArdle, Body-Fat Based) is a free, private tdee katch mcardle tool — every result computes instantly in your browser with no sign-up and no data upload.
About TDEE Calculator (Katch–McArdle, Body-Fat Based)
Because it keys on lean mass, this method gives the same BMR to a lean 90 kg lifter and a deconditioned 110 kg person with equal LBM — exactly the correction weight-based formulas need for athletic builds. It applies TDEE = (370 + 21.6 × LBM) × activity factor. Use the TDEE Calculator (Katch–McArdle, Body-Fat Based) to get an instant, clearly-explained result with the working shown step by step — free, private and with the source method cited.
How to use TDEE Calculator (Katch–McArdle, Body-Fat Based)
- 1Enter your details in the TDEE Calculator (Katch–McArdle, Body-Fat Based) input fields above.
- 2The result updates instantly with the working and reference bands shown.
- 3Adjust any value to explore how it changes the outcome — it's free and unlimited.
Why use TDEE Calculator (Katch–McArdle, Body-Fat Based)?
- ✓Instant tdee katch mcardle result that recomputes as you type — no waiting, no page reloads
- ✓100% client-side: your health data never leaves your browser
- ✓Shows the actual formula and your numbers substituted in, so you can see exactly how the result is reached
- ✓Based on published, citable sources (McArdle, Katch & Katch — Exercise Physiology, 8th ed.)
- ✓Free forever with no sign-up, account or app install
Frequently asked questions
How does the TDEE Calculator (Katch–McArdle, Body-Fat Based) work?+
Because it keys on lean mass, this method gives the same BMR to a lean 90 kg lifter and a deconditioned 110 kg person with equal LBM — exactly the correction weight-based formulas need for athletic builds. The calculation uses the formula: TDEE = (370 + 21.6 × LBM) × activity factor. Everything runs instantly in your browser as you type — your inputs are never uploaded.
Is the TDEE Calculator (Katch–McArdle, Body-Fat Based) accurate, and what is it based on?+
The method is traceable to authoritative sources: McArdle, Katch & Katch — Exercise Physiology, 8th ed.. Results are estimates — individual variation always applies, so treat the output as a well-grounded starting point.
Is the TDEE Calculator (Katch–McArdle, Body-Fat Based) free and private?+
Yes. It's completely free with no sign-up, and all computation happens locally in your browser, so none of your health data ever leaves your device.
Can I use this for medical decisions?+
This tool is for general fitness information only, not medical or training advice. Consult a professional before changing your routine.
What can I use the TDEE Calculator (Katch–McArdle, Body-Fat Based) for?+
It's commonly used for tdee katch mcardle, tdee body fat, lean mass tdee. Maintenance energy keyed to lean mass — the TDEE method of choice when you know your body-fat percentage.
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