Body fat estimator
Track composition changes using the US Navy circumference method and optional three-site caliper inputs.
Tools
Body composition & energy tools
Calculate body fat, protein, hydration, and calorie targets directly inside BodyTypeCalc.
3-site skinfold body fat
Estimate body fat % with the Jackson/Pollock 3-site skinfold method (mm).
Body fat percentage chart
See common body fat % ranges and why methods disagree.
Army body fat calculator
Circumference-based (tape test style) body fat estimate for self-tracking.
Back-calculate TDEE
Estimate your maintenance calories from real-world intake and weight change over time.
Maintenance calories
Use the Mifflin-St Jeor equation with lifestyle multipliers to plan nutrition phases.
Macro calculator
Split your calories into protein, fat, and carbs.
Protein target planner
Translate your body weight and goal into a daily protein range plus per-meal targets you can actually use.
Hydration planner
Set a daily water baseline that reflects your weight, training load, and climate so energy stays predictable.
BMI calculator
Calculate BMI with adult categories (not for kids).
Height calculator
Convert height between cm, m, inches, and feet+inches.
Kids BMI percentile (ages 2–20)
BMI-for-age percentile by sex and age for kids and teens.
Weight change % calculator
Percent change between start and current weight (optional weekly rate).
WHR calculator
Calculate waist-to-hip ratio with basic interpretation.
WHtR calculator
Calculate WHtR with target waist guidance (0.5 / 0.6).
BRI calculator
Body roundness index from waist and height (compare with WHtR).
LBM & FFMI calculator
Estimate LBM and compute FFMI / normalized FFMI.
Ideal body weight (IBW)
Estimate IBW using multiple formulas (plus AdjBW).
Body surface area (BSA)
Calculate BSA (m²) from height and weight.
Body visualizer
Create a 2D silhouette preview from measurements.
Measurement tracker (local)
Track waist/hip/WHR trends and export CSV.
Shoulder-to-waist ratio
Shoulders ÷ waist for upper-body contrast tracking.
🎭 Kibbe Body Type Calculator
Discover your Kibbe body type with our comprehensive quiz. The Kibbe system, created by David Kibbe, classifies body types based on bone structure, body flesh, and facial features. Answer 10 questions to find out if you're Dramatic, Natural, Classic, Gamine, or Romantic (and their variations)!