Ideal weight calculator.

There is no single ideal weight. Height, sex, and body composition all matter. A healthy BMI of 18.5 to 24.9 works out to 125 to 169 lb at 5 ft 9 in. The Devine, Robinson, and Miller formulas give one number each: 156, 152, and 152 lb for a man who is 5 ft 9 in. Every number here is an estimate for adults, not a goal.

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Ideal weight for your height

Healthy BMI range plus the Devine, Robinson, and Miller formulas.

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Healthy rangecalterix
111.2 to 149.6 lb
Devine 125.7 lb, Robinson 126.8 lb, Miller 132.1 lb. Estimates, not a goal.
  • Healthy BMI range (18.5 to 24.9)111.2 to 149.6 lb
  • Devine (1974)125.7 lb
  • Robinson (1983)126.8 lb
  • Miller (1983)132.1 lb
Estimates for adults, not goals. They do not replace advice from a doctor or registered dietitian.

A healthy weight range by height

Public health groups like the CDC start with the weight range that matches a healthy BMI, 18.5 to 24.9. The range is the same for men and women, and it is wide on purpose, since healthy bodies come in different builds.

Lowest healthy weight (lb) = 18.5 × height (in)² ÷ 703
Highest healthy weight (lb) = 24.9 × height (in)² ÷ 703
Example: 5 ft 9 in is 69 inches, and 69² = 4,761. Lowest = 18.5 × 4,761 ÷ 703 = 125.3 lb. Highest = 24.9 × 4,761 ÷ 703 = 168.6 lb.
HeightLowest (BMI 18.5)Highest (BMI 24.9)
4 ft 10 in89 lb119 lb
5 ft 0 in95 lb127 lb
5 ft 2 in101 lb136 lb
5 ft 4 in108 lb145 lb
5 ft 6 in115 lb154 lb
5 ft 8 in122 lb164 lb
5 ft 10 in129 lb174 lb
6 ft 0 in136 lb184 lb
6 ft 2 in144 lb194 lb
Healthy weight range for adults, rounded to the nearest pound.

To see where your own weight lands on the scale, use the BMI calculator.

The classic ideal weight formulas

Devine, Robinson, and Miller were written to help pharmacists dose medicine, not to set body goals. Each one starts with a base weight at 5 ft and adds a set amount for every inch above that.

FormulaMenWomen
Devine (1974)110.2 lb + 5.07 lb per inch over 5 ft100.3 lb + 5.07 lb per inch over 5 ft
Robinson (1983)114.6 lb + 4.19 lb per inch over 5 ft108.0 lb + 3.75 lb per inch over 5 ft
Miller (1983)123.9 lb + 3.11 lb per inch over 5 ft117.1 lb + 3.00 lb per inch over 5 ft
US-unit versions of the original kilogram formulas, with the per-inch amounts rounded to two decimals.
Devine (woman) = 100.3 + 5.07 × (height in inches − 60)
Example: a woman who is 5 ft 4 in is 64 inches. Inches over 5 ft = 4. Devine = 100.3 + 5.07 × 4 = 120.6 lb. Robinson gives 123.0 lb and Miller 129.1 lb.

Ideal weight by age and other limits

For adults, the healthy range and the formulas stay the same at every age. What changes with age is body composition: many older adults lose muscle, and weight guidance for seniors is best set with a doctor. For kids and teens, doctors use growth charts instead.

  • Muscle mass, bone structure, pregnancy, illness, and medications are not part of any formula here.
  • Treat each result as an estimate. A doctor or registered dietitian should guide any weight change.
  • For daily energy needs, try the BMR calculator. For body composition, use the body fat calculator.

Frequently asked questions

How do I calculate my ideal weight?

Multiply 18.5 and 24.9 by your height in inches squared, then divide each by 703. That gives the healthy range in pounds. At 5 ft 4 in (64 inches), the range is 107.8 to 145.1 lb.

What is the ideal weight for a woman who is 5 ft 4 in?

The healthy BMI range is about 108 to 145 lb. The classic formulas land between 121 and 129 lb for a woman at this height.

What is the ideal weight for a man who is 5 ft 10 in?

The healthy BMI range is about 129 to 174 lb. Devine, Robinson, and Miller give roughly 161, 157, and 155 lb.

Does ideal weight change with age?

Not in these formulas. The 18.5 to 24.9 BMI range applies to adults of every age, although body composition shifts over time. A doctor can help set a target for older adults.

What is the difference between ideal weight and healthy weight?

Healthy weight is a range, the one that matches a BMI of 18.5 to 24.9. Ideal weight usually means one number from a formula, which ignores muscle and body build.

Is ideal weight accurate if I lift weights?

Not very. Muscle is dense, so BMI and the classic formulas can overstate what you should weigh down. Body fat percentage and waist size are better guides for people who train.

Sources and review

  • Centers for Disease Control and Prevention (CDC): Adult BMI categories.
  • Devine BJ. Gentamicin therapy. Drug Intelligence and Clinical Pharmacy, 1974.
  • Robinson JD et al. Determination of ideal body weight for drug dosage calculations. American Journal of Hospital Pharmacy, 1983.
  • Miller DR et al. Determining ideal body weight. American Journal of Hospital Pharmacy, 1983.
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