What is the ideal weight for my height and age in 2026?

Ideal weight varies by height, sex, and body frame. For example, a 5'7" (170 cm) adult male has an ideal weight range of approximately 56–76 kg (123–167 lbs) depending on the formula used. Our calculator uses five clinically validated formulas — Devine, Robinson, Miller, Hamwi, and BMI method — to give you a comprehensive healthy weight range.

How do I calculate ideal body weight using the Devine formula?

The Devine formula calculates ideal body weight as: For men: IBW = 50 kg + 2.3 kg × (height in inches − 60). For women: IBW = 45.5 kg + 2.3 kg × (height in inches − 60). This formula was originally developed for medication dosing in clinical settings.

What is a healthy BMI weight range for adults?

A healthy BMI is between 18.5 and 24.9. To find the corresponding healthy weight range for your height, multiply your height in meters squared by 18.5 (lower bound) and 24.9 (upper bound). Our calculator does this automatically for you in both kg and lbs.

Is ideal weight different for men and women of the same height?

Yes. Most clinical formulas (Devine, Robinson, Hamwi) assign different base weights by sex. Women typically have a lower ideal body weight than men of the same height due to differences in muscle mass, bone density, and body composition. Our calculator adjusts all five formulas by gender automatically.

Which ideal weight formula is most accurate?

No single formula is universally most accurate, as ideal weight depends on muscle mass, bone density, and body composition. The BMI-based healthy range (18.5–24.9) is the most widely used clinically. Averaging the results from all five formulas — as our calculator does — provides the most balanced estimate.

What is the ideal weight for a 5'4" woman in kg and lbs?

For a 5'4" (162.6 cm) woman, the ideal body weight according to various formulas ranges from approximately 49–67 kg (108–148 lbs). The Devine formula gives 52.2 kg (115 lbs), while the BMI healthy range (18.5–24.9) gives 49–65 kg (108–144 lbs).

Does age affect ideal body weight calculations?

The standard ideal body weight formulas (Devine, Robinson, Miller, Hamwi) do not directly account for age. However, older adults may carry slightly more body fat at the same BMI. The World Health Organization recommends a BMI of 18.5–24.9 for adults of all ages, with some research suggesting 22–27 may be optimal for adults over 65.

How is ideal weight different from healthy weight range?

Ideal body weight refers to a single target number calculated by clinical formulas, while healthy weight range refers to the BMI-based range of 18.5–24.9 applied to your specific height. Our calculator shows both: the single ideal weight target from each formula AND the full healthy BMI weight range so you can see the complete picture.

📅 Last Updated: April 2026 · Based on WHO & NIH clinical guidelines

⚖️ Free Health Tool · 5 Formulas

Ideal Weight Calculator for Men & Women

Get your personalized ideal body weight range using 5 clinically validated medical formulas — Devine, Robinson, Miller, Hamwi, and BMI method. Supports metric (kg/cm) and imperial (lbs/ft) units.

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📅 Today's Health Context — April 30, 2026

70.3 kg

Avg. Male Weight

Global adult average (WHO 2024)

59.5 kg

Avg. Female Weight

Global adult average (WHO 2024)

23.9%

Global Obesity Rate

Adults with BMI ≥ 30 (WHO 2024)

18.5–24.9

WHO Healthy BMI

Normal weight range for adults

170 cm

Avg. Global Height (Men)

Approx. global male average

157 cm

Avg. Global Height (Women)

Approx. global female average

⚖️ Enter Your Details

Unit System

Biological Sex

Height

Your Current Weight (optional — for BMI status)

For informational purposes only. Consult a healthcare professional for personalized medical advice.

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Enter your details and click
Calculate Ideal Weight

Uses 5 clinically validated formulas

Average Ideal Weight

—

Healthy range: — kg

Underweight Normal Overweight Obese

Underweight <18.5 BMI Normal 18.5–24.9 Overweight 25–29.9 Obese ≥30

📊 Formula Breakdown

Formula	Ideal Weight (kg)	In lbs

✦ Average of all five formulas is shown as your recommended ideal weight.

📏 Your Healthy BMI Weight Range

Lower Bound (BMI 18.5)

— kg

Upper Bound (BMI 24.9)

— kg

What Is an Ideal Body Weight Calculator?

An ideal body weight (IBW) calculator is a tool that estimates the healthiest weight for your specific height and sex. Unlike a simple BMI calculator — which tells you whether your current weight is in a healthy range — an ideal weight calculator gives you a target number to aim for, based on clinically validated formulas used in hospitals, sports medicine, and nutritional research.

Our free ideal weight calculator uses five internationally recognized medical formulas simultaneously: Devine (1974), Robinson (1983), Miller (1983), Hamwi (1964), and the BMI-based method (WHO). By averaging all five results, you get a balanced, evidence-based estimate rather than relying on any single formula.

How to Use the Ideal Weight Calculator

Using this tool is simple:

Step 1: Select your unit system — Metric (kg/cm) or Imperial (lbs/ft/inches).
Step 2: Choose your biological sex (male or female), as all five formulas differentiate by sex.
Step 3: Enter your height in centimetres (or feet and inches for imperial).
Step 4: Optionally enter your current weight to see your actual BMI status alongside your ideal weight.
Step 5: Click "Calculate Ideal Weight" — results appear instantly with a full formula breakdown, BMI healthy range, and your current status on the weight spectrum.

The 5 Ideal Body Weight Formulas — Explained

Each formula was developed for a different clinical purpose. Here's how they work for a 5'9" (175 cm) male as an example:

1. Devine Formula (1974)

Male: IBW = 50 kg + 2.3 × (height_in − 60)
Female: IBW = 45.5 kg + 2.3 × (height_in − 60)

Originally developed for medication dosing calculations. For a 5'9" male: 50 + 2.3 × 9 = 70.7 kg (155.9 lbs). This is the most widely cited formula in clinical pharmacology.

2. Robinson Formula (1983)

Male: IBW = 52 kg + 1.9 × (height_in − 60)
Female: IBW = 49 kg + 1.7 × (height_in − 60)

A refinement of the Devine formula with slightly different coefficients. For a 5'9" male: 52 + 1.9 × 9 = 69.1 kg (152.3 lbs).

3. Miller Formula (1983)

Male: IBW = 56.2 kg + 1.41 × (height_in − 60)
Female: IBW = 53.1 kg + 1.36 × (height_in − 60)

Tends to give slightly higher ideal weights, more suitable for taller individuals. For a 5'9" male: 56.2 + 1.41 × 9 = 68.9 kg (151.9 lbs).

4. Hamwi Formula (1964)

Male: IBW = 48 kg + 2.7 × (height_in − 60)
Female: IBW = 45 kg + 2.2 × (height_in − 60)

One of the oldest clinical formulas, widely used in nutritional assessment. For a 5'9" male: 48 + 2.7 × 9 = 72.3 kg (159.4 lbs).

5. BMI-Based Method (WHO)

Ideal Weight = BMI_mid × height_m²
Where BMI_mid = 21.75 (midpoint of healthy range 18.5–24.9)

Calculates the weight corresponding to the exact midpoint of the WHO healthy BMI range. For a 175 cm person: 21.75 × (1.75)² = 66.5 kg (146.6 lbs). This method also provides the full healthy range (18.5–24.9).

WHO Healthy BMI Weight Classification

BMI Range	Classification	Health Risk
< 18.5	Underweight	Nutritional deficiency, bone density issues
18.5 – 24.9	Normal (Healthy)	Low risk — optimal health range
25.0 – 29.9	Overweight	Moderate risk — cardiovascular & metabolic
30.0 – 34.9	Obese Class I	High risk — diabetes, hypertension
≥ 35.0	Obese Class II–III	Very high risk — multiple comorbidities

Ideal Weight Examples by Height

Here are average ideal weight ranges (using the 5-formula average) for common heights:

Height	Male Ideal (kg)	Female Ideal (kg)	Healthy BMI Range (kg)
5'0" / 152 cm	50–54 kg	46–50 kg	43–57 kg
5'4" / 163 cm	58–63 kg	53–58 kg	49–66 kg
5'7" / 170 cm	64–70 kg	58–63 kg	53–72 kg
5'9" / 175 cm	67–74 kg	62–67 kg	57–76 kg
6'0" / 183 cm	74–82 kg	68–74 kg	62–83 kg
6'2" / 188 cm	79–87 kg	72–79 kg	65–88 kg

Limitations of Ideal Body Weight Formulas

These formulas were developed primarily on Western adult populations and have known limitations. They do not account for muscle mass — a professional athlete may weigh significantly more than their calculated "ideal" while being in excellent health. Body composition tools like DEXA scans or body fat percentage measurements provide a more complete picture.

Additionally, these formulas do not adjust for age. Older adults (65+) may benefit from slightly higher weights, as some research suggests BMI 22–27 is associated with lower mortality in this age group. Always consult a qualified healthcare professional for personalized medical advice.

❓ Frequently Asked Questions

Ideal weight depends on your height, biological sex, and body frame — not directly on age. For a 5'7" (170 cm) adult male, the ideal weight ranges from approximately 56–76 kg (123–167 lbs) depending on the formula. Use our calculator above to get your personalized estimate using all 5 medically validated formulas.

The Devine formula: Males = 50 kg + 2.3 kg × (height in inches − 60). Females = 45.5 kg + 2.3 kg × (height in inches − 60). For a 5'10" male: 50 + 2.3 × 10 = 73 kg (160.9 lbs). This formula was originally developed for drug dosing in clinical settings and remains the most widely cited in pharmacological literature.

Health authorities in the UK (NHS), US (CDC), Australia (NHPA), and Canada (Health Canada) all use the same WHO BMI classification: 18.5–24.9 is "Normal/Healthy". To find your healthy weight range: multiply (18.5 × your height in meters²) for the lower bound and (24.9 × your height in meters²) for the upper bound. Our calculator does this automatically.

Yes — most clinical formulas (Devine, Robinson, Hamwi, Miller) assign lower ideal weights for women than men of equal height. This reflects physiological differences in muscle mass, bone density, and body fat distribution. On average, the female ideal weight is 4–6 kg lower than the male at the same height across most formulas. The BMI-based range (18.5–24.9) applies equally to both sexes.

No single formula is universally most accurate, as "ideal" weight depends on individual body composition, muscle mass, and bone density. The BMI-based range (18.5–24.9) is the most widely adopted clinically. For a comprehensive estimate, averaging all five formulas — as this calculator does — provides the most balanced and evidence-based target. Muscle-heavy individuals (athletes, bodybuilders) should interpret results cautiously.

For a 5'4" (162.6 cm) woman: Devine formula gives 52.2 kg (115.1 lbs), Robinson gives 53.2 kg (117.3 lbs), Miller gives 57.6 kg (127 lbs), Hamwi gives 53.7 kg (118.4 lbs), and the BMI midpoint gives approximately 57.5 kg (126.8 lbs). The average across all five formulas is approximately 54.8 kg (120.8 lbs). The full healthy BMI weight range is 49–65 kg (108–143 lbs).

Standard ideal body weight formulas (Devine, Robinson, Miller, Hamwi) do not directly factor in age. However, emerging research suggests that for adults over 65, a slightly higher BMI (22–27) may be associated with better health outcomes due to muscle mass preservation and reduced frailty risk. The World Health Organization's standard healthy BMI of 18.5–24.9 applies to all adults, but older adults should seek personalized advice from their physician.

Ideal body weight (IBW) is a single target number calculated by clinical formulas (like Devine or Hamwi), often used in medical settings for drug dosing or nutritional planning. A healthy weight range is broader and reflects all weights that correspond to a BMI of 18.5–24.9 for your height. Our calculator shows both: your specific IBW target AND your full healthy BMI weight range so you have the complete picture.

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