🎯 Ideal Weight Calculator

How the Ideal Weight Calculator Works

There is no single "ideal" weight — a healthy weight depends on muscle mass, frame size, age, and other factors. This calculator therefore shows several widely used estimates side by side instead of one number:

• Devine (1974) — originally created to dose medication, now the most commonly quoted ideal body weight formula.
• Robinson (1983) and Miller (1983) — later refinements of Devine.
• Hamwi (1964) — a quick clinical rule of thumb.
• Healthy BMI range — the weight range that gives a BMI of 18.5–24.9, the "normal weight" band used by the World Health Organization.

The formulas were developed for adults and are defined for heights of 5 feet (152.4 cm) and above. They do not account for muscle mass, so athletes may be healthy well above them.

Formula

h = inches of height over 5 ft (60 in)
Devine:   men 50 kg + 2.3 kg × h     women 45.5 kg + 2.3 kg × h
Robinson: men 52 kg + 1.9 kg × h     women 49 kg + 1.7 kg × h
Miller:   men 56.2 kg + 1.41 kg × h  women 53.1 kg + 1.36 kg × h
Hamwi:    men 48 kg + 2.7 kg × h     women 45.5 kg + 2.2 kg × h
Healthy BMI range: weight = 18.5 × height(m)²  to  24.9 × height(m)²

How to Use It

1. Choose metric or US units.
2. Select sex and enter your height.
3. Compare the formula results and the healthy BMI weight range.

Frequently Asked Questions

What is the ideal weight for my height?

Different formulas give slightly different answers, which is why this calculator shows four of them plus the healthy BMI range. For most adults, a weight inside the BMI 18.5–24.9 range is considered a healthy weight, but body composition matters too.

Which ideal body weight formula is most accurate?

None is universally best. The Devine formula is the most widely used in clinical settings, while the BMI range is the broadest general guide. All of them are population-level estimates, not personal targets.

Do these formulas work for athletes or children?

No. They are designed for adults and do not account for muscle mass, so very muscular people can be healthy above these values. For children and teenagers, BMI-for-age percentiles should be used instead.

Related Calculators

• ⚖️ BMI Calculator — Calculate your Body Mass Index in metric or imperial units.
• 📏 Body Fat Percentage Calculator — Estimate your body fat using the U.S. Navy circumference method.
• 🔥 Calorie Calculator (TDEE) — Find your daily calorie needs using the Mifflin-St Jeor formula.
• 🥚 Protein Intake Calculator — Daily protein needs in grams for your weight and goal.

Formula and content last reviewed: September 2026. All calculations run in your browser — nothing you enter is sent to or stored on our servers.