BMI & Body Weight Calculators — Health

Estimate ABSI, BMI, waist-to-height ratio, and relative central-adiposity risk from waist, height, weight, age, and sex.

Estimate ideal body weight, adjusted body weight, and dosing-weight comparisons for obesity-aware medication and nutrition planning.

Estimate body adiposity index and compare the result with age-adjusted healthy body-fat ranges using hip circumference and height.

Estimate ideal body weight, adjusted body weight, lean body weight, and BMI for obesity-aware dosing and clinical weight planning.

Project fat mass, lean mass, and body-fat changes from calorie intake, maintenance calories, protein intake, and timeline assumptions.

Estimate body fat percentage, fat mass, and lean mass using the U.S. Navy body circumference method.

Estimate BMI, healthy-weight range, waist-to-height ratio, and supporting body-composition metrics from weight and height.

Estimate goal weight, calorie targets, fat loss pace, and macro guidance for a body recomposition phase.

Estimate fat-free mass index, normalized FFMI, and muscularity range from weight, height, and body-fat percentage.

Find your healthy weight range based on height, age, gender, and frame size.

Compare major ideal-body-weight formulas and estimate a practical body-weight range for height-based clinical and weight-planning use.

Assess overweight risk using BMI, waist circumference, and waist-to-height ratio, then estimate a practical healthy-weight range.

Calculate bmi for kids with inputs, formulas, and instant results.

Estimate ponderal index, BMI comparison, and a height-adjusted weight range for evaluating body proportions at very short or tall statures.