Ideal Weight Calculator

Find your ideal body weight using multiple scientific formulas

Your Details

Gender

Male

Female

Height (cm)

E.g. 5 feet 7 inches = 170.2 cm

Enter your height and gender, then click Calculate

Ideal Weight by Formula (kg)

Formula	Ideal Weight (kg)

Healthy BMI Range (18.5–24.9) for Your Height

Min: — kg Max: — kg

Healthy Range

BMI-based range uses WHO healthy BMI of 18.5–24.9.

How to Use

Enter your Height in centimetres.
Select your Gender.
Click Calculate to see ideal weight ranges from 4 different formulas and a BMI-based healthy weight range.
Use the results as a reference range — consult your doctor for a personalised target.

Why Are There Multiple Formulas?

There is no single universally agreed "ideal" weight. Different formulas were developed at different times for different populations. Each has its own strengths. Rather than picking one, looking at the range across all formulas gives a more balanced picture of a healthy target weight.

The Four Formulas Used

Formula	Base (5 ft / 152 cm) Men	For Each Extra Inch
Hamwi (1964)	48 kg	+2.7 kg
Devine (1974)	50 kg	+2.3 kg
Robinson (1983)	52 kg	+1.9 kg
Miller (1983)	56.2 kg	+1.41 kg

Women's base values are 2–5 kg lower; increments are slightly smaller. All formulas add per-inch above 5 feet (152 cm).

BMI-Based Healthy Range

The WHO defines healthy BMI as 18.5–24.9 globally; for Asians/Indians the upper threshold is often lowered to 22.9. Our calculator shows the weight range corresponding to 18.5–22.9 BMI for your height as an additional reference.

Limitations

All formulas ignore muscle mass — a fit person with high muscle mass may be "overweight" by these metrics.
Frame size (small, medium, large bone structure) is not accounted for.
Age-related changes in body composition are not considered.
Use these as targets to discuss with your doctor, not as absolute goals.

Frequently Asked Questions

No single formula is universally most accurate — each was developed for specific populations and contexts. The Devine formula is most commonly used in clinical settings (e.g., for drug dosing). The BMI-based range (18.5–22.9 for Indians) is arguably the most relevant for health risk assessment. Looking at the consensus across all formulas gives the most balanced picture.

Not necessarily. The ideal weight range represents a healthy zone, not a single target. Where you feel best, perform well, and can maintain your weight without strict restriction is more important than hitting a specific number. Many people are healthiest in the middle of their ideal range.

The classic formulas (Hamwi, Devine) were developed in the 1960s–80s using Western populations and may underestimate ideal weight for taller individuals or those with larger frames. These formulas work best for people of average height (165–175 cm). For very tall people (185 cm+), the BMI-based range may give a more reasonable target.

Safe weight loss is 0.5–1 kg per week (a calorie deficit of 550–1,100 kcal/day). Faster loss usually involves muscle loss and is harder to sustain. Divide the number of kg to lose by 0.5–0.75 to estimate minimum weeks. E.g., losing 10 kg at 0.75 kg/week = ~13–14 weeks. Always prioritise sustainable habits over speed.