📊 Your Ideal Weight Breakdown
| Formula | Ideal Weight Target | Notes / Context |
|---|---|---|
| Devine (1974) Clinical standard | — | Most widely used formula in clinical settings for drug dosing. |
| Robinson (1983) | — | Modified Devine's factors for improved modern accuracy. |
| Miller (1983) | — | Adjusted scaling constants; often preferred for shorter stature. |
| Hamwi (1964) | — | The oldest heuristic; widely used as a dietetic rule of thumb. |
| Healthy BMI Weight Range | — | Standard physiological weight range based on BMI 18.5 – 24.9. |
Quick Answer: According to the clinically standard Devine formula, the ideal body weight for a 5 ft 10 in (178 cm) male is 73.0 kg (160.9 lb). For a 5 ft 4 in (163 cm) female, the ideal weight target is 54.7 kg (120.6 lb). These equations assume a medium frame size, scaling only with height and biological sex.
Understanding Ideal Body Weight (IBW)
The concept of an "ideal weight" sounds highly personal, but its origins are strictly mathematical. In 1974, Dr. Ben Devine introduced these equations to solve a practical hospital problem: calculating correct drug clearances for patients. Because fat tissue clears medications differently than muscle mass, clinicians needed a quick height-based estimate of lean mass. Today, these equations are still used for dosing anesthesia and narrow-therapeutic drugs.
While popular in fitness circles, these formulas are not perfect indicators of health. They ignore muscle mass entirely. An active person with dense muscle can easily weigh ten kilograms more than their calculated "ideal" weight while staying completely healthy. For everyday life, these calculations should serve as a loose baseline, not a strict medical mandate.
How to Use This Tool
- Select your biological sex and enter your age. The equations apply specifically to adults aged 18 to 80.
- Input your height. You can switch between Imperial units (feet and inches) or Metric units (centimeters).
- Enter your current weight and body frame size if you want customized deviation metrics. We adjust the formula ranges by 10% for small or large frame structures.
How Ideal Weight is Calculated
All four classic equations start with a baseline weight at 5 feet (60 inches) tall. For every extra inch above this baseline, they add a set weight modifier. If you are under 5 feet, the math continues continuously, subtracting the modifier for each inch below 60 inches.
The table below shows the exact scaling coefficients used in our calculator:
| Formula | Male Equation (per inch over 5 ft) | Female Equation (per inch over 5 ft) |
|---|---|---|
| Devine (1974) | 50.0 kg + 2.3 kg / inch | 45.5 kg + 2.3 kg / inch |
| Robinson (1983) | 52.0 kg + 1.9 kg / inch | 49.0 kg + 1.7 kg / inch |
| Miller (1983) | 56.2 kg + 1.41 kg / inch | 53.1 kg + 1.36 kg / inch |
| Hamwi (1964) | 48.0 kg + 2.7 kg / inch | 45.5 kg + 2.2 kg / inch |
Worked Mathematical Examples
Example 1 (Indian Metric Height): A male standing 178 cm tall.
- Convert height to inches:
178 cm / 2.54 = 70.08 inches. - Calculate height over 5 feet:
70.08 - 60 = 10.08 inches. - Devine calculation:
50 kg + (2.3 kg × 10.08) = 50 + 23.18 = 73.18 kg. - Robinson calculation:
52 kg + (1.9 kg × 10.08) = 52 + 19.15 = 71.15 kg.
Example 2 (Indian Imperial Height): A female standing 5 feet 4 inches (163 cm) tall.
- Height in inches:
(5 × 12) + 4 = 64 inches. - Calculate height over 5 feet:
64 - 60 = 4 inches. - Devine calculation:
45.5 kg + (2.3 kg × 4) = 45.5 + 9.2 = 54.7 kg. - Robinson calculation:
49 kg + (1.7 kg × 4) = 49 + 6.8 = 55.8 kg.
Height to Ideal Weight Reference Table
This reference chart lists the Devine ideal weights for adults across common heights. It covers heights from 4'10" (147 cm) to 6'4" (193 cm) in two-inch increments.
| Height | Male (Devine Ideal Weight) | Female (Devine Ideal Weight) |
|---|---|---|
| 4'10" (147 cm) | 45.4 kg (100.1 lb) | 40.9 kg (90.2 lb) |
| 5'0" (152 cm) | 50.0 kg (110.2 lb) | 45.5 kg (100.3 lb) |
| 5'2" (157 cm) | 54.6 kg (120.4 lb) | 50.1 kg (110.5 lb) |
| 5'4" (163 cm) | 59.2 kg (130.5 lb) | 54.7 kg (120.6 lb) |
| 5'6" (168 cm) | 63.8 kg (140.7 lb) | 59.3 kg (130.7 lb) |
| 5'8" (173 cm) | 68.4 kg (150.8 lb) | 63.9 kg (140.9 lb) |
| 5'10" (178 cm) | 73.0 kg (160.9 lb) | 68.5 kg (151.0 lb) |
| 6'0" (183 cm) | 77.6 kg (171.1 lb) | 73.1 kg (161.2 lb) |
| 6'2" (188 cm) | 82.2 kg (181.2 lb) | 77.7 kg (171.3 lb) |
| 6'4" (193 cm) | 86.8 kg (191.4 lb) | 82.3 kg (181.4 lb) |
Why the Formulas Disagree
The equations disagree because they represent different historical populations and research methodologies. Devine published his coefficients in 1974 based on retrospective actuarial tables from life insurance files. Robinson (1983) and Miller (1983) later revised these parameters. They sought to clean up structural mathematical anomalies and match actual modern clinical populations, resulting in slightly lower, leaner estimates. Hamwi is a simple rule-of-thumb that predates computerized modeling, using round numbers that remain popular due to their simplicity.
Who Should Not Rely on This Calculator
In my experience reviewing these medical charts, individuals often mistake their aesthetic weight targets for physiological requirements. The formulas only count vertical stature. They are unsuitable for:
- Athletes and lifters: Muscle tissue is much denser than fat. A highly muscular individual will be flagged as overweight by height-based metrics despite possessing a low body fat percentage.
- Older adults (65+): Clinical studies show that carrying a small buffer of weight is protective for older populations, helping reduce fracture and mortality risks.
- Pregnant or breastfeeding women: Gestational tissue, amniotic fluid, and physiological fluid changes make height-based ideal weight targets medically unsafe.
- Children: Growing teenagers and children should be assessed using pediatric height-for-age percentile charts, such as those provided by the CDC Growth Charts.
Ideal Weight vs. BMI Healthy Range
An ideal body weight calculation gives a single point estimate. This number can feel restrictive. Conversely, the body mass index (BMI) provides a broad physiological range. A healthy BMI sits between 18.5 and 24.9, which corresponds to a comfortable weight span of roughly fifteen to twenty kilograms. If you want a more flexible, realistic goal that accommodates different body styles, check out our Healthy Weight Range Calculator.
The Indian Context: Stature and BMI Categories
In India and neighboring South Asian regions, height is traditionally spoken of in feet and inches rather than centimeters. Medical insurers and clinical organizations like Policybazaar or ICICI Lombard frequently reference the Devine formula to set baseline premium categories. However, health guidelines for South Asian populations suggest that standard BMI cutoffs are too high. Research shows South Asians carry higher body fat at lower body weights. Insurers are starting to recognize that the upper BMI limit for South Asians is 23 rather than 24.9.
Sources and References
- Devine, B. J. (1974). Gentamicin therapy. Drug Intelligence & Clinical Pharmacy, 8(11), 650-655.
- Pai, M. P., & Paloucek, F. P. (2000). The origin of the "ideal" body weight equations. Annals of Pharmacotherapy, 34(9), 1066-1069.
- World Health Organization. (2004). Appropriate body-mass index for Asian populations and its implications for policy and intervention strategies. The Lancet, 363(9403), 157-163.