Ideal Weight Calculator

Ideal weight varies by formula. For a 5'10" (178 cm) male: Devine = 73 kg (161 lb), Robinson = 71 kg (157 lb), Miller = 70.3 kg (155 lb), Hamwi = 75 kg (165 lb) — an average of about 72 kg (159 lb). For a 5'5" (165 cm) female: Devine = 57 kg (126 lb), Robinson = 57.5 kg (127 lb), Miller = 59.9 kg (132 lb), Hamwi = 56.5 kg (125 lb). These are statistical averages, not targets — healthy BMI range (18.5–24.9) gives a wider, more realistic goal window.

Age has minimal effect on ideal weight formulas — most are based purely on height and sex. The widely used BMI-based range is more practical: for each height, BMI 18.5–24.9 gives a healthy weight range. For 5'6" (168 cm): healthy range is 51–63 kg (113–139 lb). For 5'10" (178 cm): 59–79 kg (130–174 lb). After age 60, slight increases in BMI cutoffs may apply, but most clinical formulas remain unchanged.

No single formula is universally most accurate — each was developed for different populations. The Devine formula (1974) is most commonly used in clinical settings (e.g., drug dosing). Robinson (1983) and Miller (1983) are generally considered more accurate for taller people. Hamwi (1964) is the oldest still in use. For general wellness, the BMI healthy range (18.5–24.9) gives a more personalized target, especially when body composition is also considered. The average across all four formulas is a practical consensus estimate.

The Devine formula (1974): Men = 50 kg + 2.3 kg × (height in inches − 60). Women = 45.5 kg + 2.3 kg × (height in inches − 60). Example: a 5'10" (70 in) man → 50 + 2.3 × 10 = 73.0 kg (161 lb). Originally developed for clinical drug dosing calculations, not for general fitness. It gives lower estimates for very tall people, so it is most accurate in the 5'0"–6'0" range.

Yes. All four major formulas assign lower ideal weights to women. At 5'8" (173 cm): Devine male = 68.1 kg, female = 63.6 kg — a difference of 4.5 kg (10 lb). This reflects differences in average bone density, muscle mass, and body composition. Women generally have higher body fat % at the same body weight relative to height, which is why sex-specific formulas exist. A man and woman of identical height can have very different healthy weight ranges.