Setting realistic target weights requires moving past arbitrary social media aesthetics toward clinical reference points. Enter your height and biological sex to establish a clear reference point for fat loss or muscle gain goals without under-nourishing your body.
Not saved. A free account keeps it, ready for Health Analytics.
Ideal body weight uses the Devine formula to calculate a health-focused target weight based on biological sex and height. Originally developed for clinical drug dosing, it provides a realistic reference weight where health risks are minimized, serving as an anchor for setting weight loss or muscle building targets.
The Devine formula calculates ideal body weight based on height and biological sex. First established by Dr. Ben J. Devine in 1974 for calculating medical drug dosages, it remains the standard clinical reference for estimating body mass in healthy adults.
The calculation starts with a set target for a person standing 5 feet (152.4 cm) tall, adding 2.3 kilograms for every additional inch (2.54 cm) of height above that mark:
For individuals measuring 152.4 cm or shorter, the formula uses the base values of 50 kg for men and 45.5 kg for women directly.
While body composition varies between individuals due to bone structure and muscle mass, the Devine formula offers a consistent reference anchor. It prevents setting dangerously low weight loss goals that could compromise bone density, metabolic rate, or endocrine function.
The Devine formula provides a reliable population-average target, but it carries clear physiological limitations:
This tool provides a general wellness estimate, not medical advice or clinical diagnosis. Combine your output with waist circumference measurements and blood markers from your healthcare practitioner.
Pick a band to see what it means and what to do. Yours is selected once you calculate.
Your current weight sits more than 10% below the clinical Devine target estimate, which may indicate low lean muscle mass or chronic energy deficiency.
Increase your daily energy intake by 250-300 kcal using dense nutrient sources and follow the weight-gain-plan-calculator to build structural tissue.
Real situations. Tap one to run it through the calculator above.
Marcus stands 180 cm tall and wants to know what a realistic long-term target weight looks like as he starts exercising again.
Calculator result: Estimated ideal weight: 75 kg
Marcus receives a clear clinical anchor to aim for. Rather than guessing an unachievable target from his teenage years, he can now plan a gradual fat loss phase targeting around 0.5 kg loss per week using the calorie-calculator.
Elena is 165 cm tall and wants to ensure her target weight supports endurance running without dropping into a low energy availability state.
Calculator result: Estimated ideal weight: 56.9 kg
The Devine estimate gives Elena a floor for her target weight to protect bone density and hormonal function. She can cross-reference this target with the body-fat-calculator to preserve lean mass during peak training blocks.
David is 172 cm tall with high muscularity, wondering why standard height-weight estimates list him above average target levels.
Calculator result: Estimated ideal weight: 67.7 kg
Because David carries significantly more skeletal muscle mass than average, his healthy operating weight will sit above the Devine formula target. He should use the waist-to-height-ratio-calculator to confirm his abdominal fat remains in a healthy zone.
Tick them off as you go.
The Devine formula was engineered to produce a specific reference point for medical dosing, not a rigid lifestyle rule. In practice, healthy adults operate within a range of roughly 10% above or below this calculation depending on frame size and muscle mass. Treat the output as the midpoint of a healthy 5 to 8 kg target band.
If you engage in regular resistance training, your extra weight is likely lean muscle mass rather than visceral fat. In this case, ignore the height-weight mismatch and track your health using waist circumference and body fat percentage rather than the scale. Muscle mass provides metabolic protection, so sitting above the Devine number is advantageous here.
You only need to recalculate if your height reading changes or if you are tracking growth in younger adults. Since adult height remains stable until later in life, your Devine reference number stays constant. Re-evaluate your progress against this fixed anchor every 4 to 8 weeks.
Biological sex determines typical essential fat distribution, bone mass density, and muscle mass proportions relative to height. Females naturally store higher levels of essential adipose tissue around reproductive organs, requiring sex-specific base constants in the Devine formula.
The Devine formula gives you a direct target mass in kilograms, whereas BMI provides a broad ratio range. Both tools share similar limitations regarding muscle mass, but the Devine number is easier to use when setting exact target numbers in a workout or diet plan.
For heights under 152.4 cm, the formula defaults to the standard baseline constant of 50 kg for men and 45.5 kg for women. If you fall into this height category, treat the output as a high-end reference and rely on waist-to-height ratio to assess target body mass.
As your weight changes toward your target, your metabolic rate adjusts because smaller or larger bodies burn different amounts of energy at rest. Once you reach your target range, recalculate your daily maintenance needs using the bmr-calculator to adjust your caloric intake.
General wellness information, not medical advice. If you have a health condition or are worried about a result, talk to a doctor.