Centers for Disease Control and Prevention (CDC)
BMI categories and general BMI guidance.
Sources
Sources and references
Calc Atlas uses commonly accepted formulas, public health references, and standard financial math conventions where possible. This page highlights the kinds of source material that inform classifications, ranges, and calculator logic.
Health references
National Institutes of Health (NIH)
BMI background and weight-status framing.
Mifflin-St Jeor equation
Widely used resting energy expenditure equation.
U.S. Navy body fat method
Common circumference-based body-fat estimation reference.
Finance and business references
Standard compound interest formulas
Common future-value and compounding math conventions.
ROI and percentage return conventions
General return-on-investment framing and definitions.
Loan amortization formulas
Common mortgage payment structure and terminology.
General calculator references
Common percentage math
Reference for standard percentage operations used by general tools.
Nutrition and protein guidance
General public nutrition reference context.