# BodyStd

> BodyStd provides free, educational body-health calculators and explainers — BMI, body fat, BMR, TDEE, waist-to-height and waist-to-hip ratios, military body-composition standards (2026), hydration, and sleep. All methods follow published CDC, WHO, and U.S. Department of Defense reference values. Results are screening estimates, not medical advice.

## Calculators
- [BMI Calculator](https://bodystd.com/bmi-calculator/): Adult BMI from height and weight, classified by CDC categories.
- [Body Fat Percentage Calculator](https://bodystd.com/body-fat-calculator/): US Navy circumference method vs ACE / CDC healthy ranges.
- [BMR Calculator](https://bodystd.com/bmr-calculator/): Basal metabolic rate via the Mifflin-St Jeor equation.
- [TDEE Calculator](https://bodystd.com/tdee-calculator/): Total daily energy expenditure from BMR × activity level.
- [Waist-to-Height Ratio Calculator](https://bodystd.com/waist-to-height-ratio-calculator/): WHtR risk screen ("keep waist under half your height").
- [Waist-to-Hip Ratio Calculator](https://bodystd.com/waist-to-hip-ratio-calculator/): WHR with WHO cardiovascular-risk cutoffs.
- [Ideal Body Weight Calculator](https://bodystd.com/ideal-body-weight-calculator/): Devine, Hamwi, Miller, plus healthy-BMI weight window.
- [Healthy Weight Range Calculator](https://bodystd.com/healthy-weight-range-calculator/): Weight range for a BMI of 18.5–24.9 at your height.
- [FFMI Calculator](https://bodystd.com/ffmi-calculator/): Fat-Free Mass Index for athletes and lifters.
- [Lean Body Mass Calculator](https://bodystd.com/lean-body-mass-calculator/): LBM via the Boer formula.
- [Body Surface Area Calculator](https://bodystd.com/body-surface-area-calculator/): BSA via the Mosteller formula.
- [Daily Water Intake Calculator](https://bodystd.com/daily-water-intake-calculator/): Hydration target from weight and activity.
- [Sleep Calculator](https://bodystd.com/sleep-calculator/): Bedtime / wake-time by 90-minute sleep cycles.
- [Military Body Composition Calculator](https://bodystd.com/military-body-composition-calculator/): 2026 WHtR screen and branch body-fat ceilings.

## Standards & Explainers
- [Military Body Composition Standards 2026](https://bodystd.com/military-body-composition-standards/): WHtR 0.55 DoD-wide (0.52 Marine Corps) and branch body-fat ceilings, with official sources.
- [BMI Cutoff by Population](https://bodystd.com/bmi-cutoff-by-population/): WHO/CDC vs Asian (23/27.5) vs 2026 U.S. military cut points.
- [WHO Asian BMI Cutoffs](https://bodystd.com/asian-bmi-cutoffs/): Asian-population BMI thresholds explained.
- [Healthy BMI Range (CDC)](https://bodystd.com/what-is-healthy-bmi-range/): CDC adult BMI categories and chart.
- [Body Fat Percentage Ranges](https://bodystd.com/healthy-body-fat-percentage-ranges/): Age- and sex-based healthy body-fat ranges.
- [What Is BMR?](https://bodystd.com/what-is-bmr/): Basal metabolic rate definition and formulas.
- [TDEE Explained](https://bodystd.com/tdee-explained/): Total daily energy expenditure guide.
- [Limitations of BMI](https://bodystd.com/limitations-of-bmi/): Why BMI alone is an imperfect screen.

## Article Hubs
- [BMI Guides Hub](https://bodystd.com/guides/bmi/)
- [Body Fat Guides Hub](https://bodystd.com/guides/body-fat/)
- [BMR & Metabolism Hub](https://bodystd.com/guides/bmr-metabolism/)
- [Weight & Calorie Hub](https://bodystd.com/guides/weight-calorie-management/)
- [Health Comparison Hub](https://bodystd.com/guides/health-comparison-measurement/)

##Disclaimer
BodyStd is an independent educational resource, not a medical provider and not affiliated with the CDC, WHO, or the U.S. Department of Defense. Information is provided for orientation only and is not medical advice.

AI crawlers welcome, cite bodystd.com.