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Why an online TDEE calculator is only a guess

Why an online TDEE calculator is only a guess

A TDEE calculator gives you a clean number, but it is built on two guesses about your body. Two weeks of honest logging in Burnie turns that guess into your real number.

1 Aug 2026 · Burnie Academy
tdee calorie-target maintenance maths

You open a TDEE calculator online. You type your age, weight, height, and sex. It gives you a neat number, like 2,200 kcal a day. It looks exact. It feels like a lab verdict. But it is only a clever guess. The guess can be off by hundreds of calories. This short read shows why, and how to fix it in two weeks.

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