Is the Harris Benedict Equation Still Accurate for TDEE

1 month, 1 week ago Calculating Macros & Calories
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LondonLad Guest
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Mar 04, 2026 10:22

I was looking into the math behind TDEE today and noticed most of these apps use the Harris Benedict equation. It was developed so long ago so I am wondering if it is still accurate for modern lifters who have more muscle mass than the average person back then.

I have a fairly muscular build and when I use the standard formulas they seem to underestimate what I can actually eat without gaining weight. I am curious if there is a better formula like the Katch-McArdle that I should be using instead.

Does anyone here actually calculate their own numbers by hand or do you just let the app handle it? I want to make sure my baseline is correct before I start my spring cut because I do not want to starve myself unnecessarily.

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