How These Calculators Work

Methodology: formulas use established estimate models (circumference-based body-fat, BMR/TDEE-style calorie math, and macro ratios).

Inputs: body measurements, age, activity level, weight, and calorie targets.

Datasets: activity multipliers, macro profile ratios, and baseline body-fat formula constants.

Limitations: hydration, measurement error, and individual physiology can change real outcomes significantly.

Intended use: educational self-tracking and planning, not diagnosis or treatment.

For background context, see the About page.