Ideal Weight Calculator: Find Your Healthy Weight Range

What Is "Ideal Body Weight"?

Ideal body weight (IBW) is a target weight range associated with optimal health outcomes for a given height and sex. Unlike BMI which only tells you where you are, ideal weight calculations give you a concrete target to aim for. However, the concept of a single "ideal" weight is oversimplified — health exists across a range.

Ideal Weight Formulas Compared

Several formulas exist, each developed for different medical purposes:

Formula	Year	Men (5'10" / 178cm)	Notes
Devine	1974	75.0 kg	Original clinical formula; widely used in drug dosing
Robinson	1983	74.2 kg	Revised for better accuracy
Miller	1983	72.1 kg	Produces slightly lower values
Hamwi	1964	78.0 kg	Simple rule-based formula
Healthy BMI range	WHO	67–88 kg	BMI 18.5–24.9 for 178cm

Healthy Weight Range (Recommended Approach)

Rather than a single number, a healthy weight range based on BMI 18.5–24.9 is more practical. For someone 170 cm (5'7") tall:

• Lower bound (BMI 18.5): ~53.5 kg
• Upper bound (BMI 24.9): ~72.0 kg

Factors That Affect Your Ideal Weight

• Frame size — Large-framed individuals naturally weigh more.
• Muscle mass — Athletes and bodybuilders have higher ideal weights.
• Age — Some weight gain with age is normal and healthy.
• Ethnicity — Different populations have different risk thresholds.

Calculate Your Ideal Weight

Use FavorTool Ideal Weight Calculator to see all four formula results side by side, along with your healthy BMI weight range. Both metric and imperial units are supported.