TDEE Calculator (Katch-McArdle)
Katch-McArdle: BMR = 370 + 21.6 × LBM (kg) · uses lean body mass, not total weight.
- Lean body mass
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- BMR (Katch-McArdle)
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- TDEE
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Best when body-fat % is accurately measured (DEXA, BIA, calipers). For people with average composition, Mifflin-St Jeor and Katch-McArdle agree within ~5%.
About this tool
TDEE Calculator (Katch-McArdle) is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
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